зеркало из https://github.com/mozilla/gecko-dev.git
1035 строки
33 KiB
C++
1035 строки
33 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGLContext.h"
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#include <algorithm>
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#include "angle/ShaderLang.h"
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#include "CanvasUtils.h"
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#include "gfxPrefs.h"
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#include "GLContext.h"
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#include "jsfriendapi.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Services.h"
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#include "nsIObserverService.h"
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#include "WebGLActiveInfo.h"
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#include "WebGLBuffer.h"
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#include "WebGLContextUtils.h"
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#include "WebGLFramebuffer.h"
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#include "WebGLProgram.h"
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#include "WebGLRenderbuffer.h"
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#include "WebGLSampler.h"
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#include "WebGLShader.h"
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#include "WebGLTexture.h"
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#include "WebGLUniformLocation.h"
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#include "WebGLValidateStrings.h"
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#include "WebGLVertexArray.h"
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#include "WebGLVertexAttribData.h"
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#if defined(MOZ_WIDGET_COCOA)
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#include "nsCocoaFeatures.h"
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#endif
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namespace mozilla {
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bool
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WebGLContext::ValidateBlendEquationEnum(GLenum mode, const char* info)
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{
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switch (mode) {
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case LOCAL_GL_FUNC_ADD:
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case LOCAL_GL_FUNC_SUBTRACT:
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case LOCAL_GL_FUNC_REVERSE_SUBTRACT:
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return true;
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case LOCAL_GL_MIN:
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case LOCAL_GL_MAX:
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if (IsWebGL2() ||
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IsExtensionEnabled(WebGLExtensionID::EXT_blend_minmax))
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{
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return true;
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}
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break;
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default:
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break;
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}
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ErrorInvalidEnumInfo(info, mode);
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return false;
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}
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bool
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WebGLContext::ValidateBlendFuncDstEnum(GLenum factor, const char* info)
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{
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switch (factor) {
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case LOCAL_GL_ZERO:
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case LOCAL_GL_ONE:
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case LOCAL_GL_SRC_COLOR:
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case LOCAL_GL_ONE_MINUS_SRC_COLOR:
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case LOCAL_GL_DST_COLOR:
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case LOCAL_GL_ONE_MINUS_DST_COLOR:
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case LOCAL_GL_SRC_ALPHA:
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case LOCAL_GL_ONE_MINUS_SRC_ALPHA:
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case LOCAL_GL_DST_ALPHA:
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case LOCAL_GL_ONE_MINUS_DST_ALPHA:
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case LOCAL_GL_CONSTANT_COLOR:
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case LOCAL_GL_ONE_MINUS_CONSTANT_COLOR:
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case LOCAL_GL_CONSTANT_ALPHA:
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case LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA:
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return true;
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default:
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ErrorInvalidEnumInfo(info, factor);
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return false;
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}
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}
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bool
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WebGLContext::ValidateBlendFuncSrcEnum(GLenum factor, const char* info)
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{
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if (factor == LOCAL_GL_SRC_ALPHA_SATURATE)
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return true;
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return ValidateBlendFuncDstEnum(factor, info);
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}
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bool
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WebGLContext::ValidateBlendFuncEnumsCompatibility(GLenum sfactor,
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GLenum dfactor,
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const char* info)
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{
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bool sfactorIsConstantColor = sfactor == LOCAL_GL_CONSTANT_COLOR ||
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sfactor == LOCAL_GL_ONE_MINUS_CONSTANT_COLOR;
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bool sfactorIsConstantAlpha = sfactor == LOCAL_GL_CONSTANT_ALPHA ||
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sfactor == LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA;
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bool dfactorIsConstantColor = dfactor == LOCAL_GL_CONSTANT_COLOR ||
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dfactor == LOCAL_GL_ONE_MINUS_CONSTANT_COLOR;
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bool dfactorIsConstantAlpha = dfactor == LOCAL_GL_CONSTANT_ALPHA ||
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dfactor == LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA;
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if ( (sfactorIsConstantColor && dfactorIsConstantAlpha) ||
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(dfactorIsConstantColor && sfactorIsConstantAlpha) )
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{
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ErrorInvalidOperation("%s are mutually incompatible, see section 6.8 in"
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" the WebGL 1.0 spec", info);
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return false;
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}
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return true;
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}
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bool
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WebGLContext::ValidateDataOffsetSize(WebGLintptr offset, WebGLsizeiptr size, WebGLsizeiptr bufferSize, const char* info)
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{
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if (offset < 0) {
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ErrorInvalidValue("%s: offset must be positive", info);
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return false;
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}
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if (size < 0) {
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ErrorInvalidValue("%s: size must be positive", info);
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return false;
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}
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// *** Careful *** WebGLsizeiptr is always 64-bits but GLsizeiptr
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// is like intptr_t. On some platforms it is 32-bits.
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CheckedInt<GLsizeiptr> neededBytes = CheckedInt<GLsizeiptr>(offset) + size;
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if (!neededBytes.isValid() || neededBytes.value() > bufferSize) {
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ErrorInvalidValue("%s: invalid range", info);
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return false;
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}
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return true;
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}
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/**
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* Check data ranges [readOffset, readOffset + size] and [writeOffset,
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* writeOffset + size] for overlap.
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*
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* It is assumed that offset and size have already been validated with
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* ValidateDataOffsetSize().
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*/
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bool
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WebGLContext::ValidateDataRanges(WebGLintptr readOffset, WebGLintptr writeOffset, WebGLsizeiptr size, const char* info)
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{
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MOZ_ASSERT((CheckedInt<WebGLsizeiptr>(readOffset) + size).isValid());
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MOZ_ASSERT((CheckedInt<WebGLsizeiptr>(writeOffset) + size).isValid());
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bool separate = (readOffset + size < writeOffset || writeOffset + size < readOffset);
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if (!separate) {
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ErrorInvalidValue("%s: ranges [readOffset, readOffset + size) and [writeOffset, "
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"writeOffset + size) overlap", info);
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}
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return separate;
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}
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bool
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WebGLContext::ValidateTextureTargetEnum(GLenum target, const char* info)
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{
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switch (target) {
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case LOCAL_GL_TEXTURE_2D:
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case LOCAL_GL_TEXTURE_CUBE_MAP:
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return true;
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case LOCAL_GL_TEXTURE_3D:
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if (IsWebGL2())
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return true;
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break;
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default:
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break;
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}
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ErrorInvalidEnumInfo(info, target);
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return false;
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}
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bool
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WebGLContext::ValidateComparisonEnum(GLenum target, const char* info)
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{
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switch (target) {
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case LOCAL_GL_NEVER:
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case LOCAL_GL_LESS:
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case LOCAL_GL_LEQUAL:
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case LOCAL_GL_GREATER:
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case LOCAL_GL_GEQUAL:
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case LOCAL_GL_EQUAL:
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case LOCAL_GL_NOTEQUAL:
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case LOCAL_GL_ALWAYS:
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return true;
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default:
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ErrorInvalidEnumInfo(info, target);
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return false;
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}
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}
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bool
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WebGLContext::ValidateStencilOpEnum(GLenum action, const char* info)
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{
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switch (action) {
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case LOCAL_GL_KEEP:
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case LOCAL_GL_ZERO:
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case LOCAL_GL_REPLACE:
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case LOCAL_GL_INCR:
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case LOCAL_GL_INCR_WRAP:
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case LOCAL_GL_DECR:
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case LOCAL_GL_DECR_WRAP:
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case LOCAL_GL_INVERT:
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return true;
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default:
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ErrorInvalidEnumInfo(info, action);
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return false;
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}
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}
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bool
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WebGLContext::ValidateFaceEnum(GLenum face, const char* info)
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{
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switch (face) {
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case LOCAL_GL_FRONT:
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case LOCAL_GL_BACK:
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case LOCAL_GL_FRONT_AND_BACK:
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return true;
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default:
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ErrorInvalidEnumInfo(info, face);
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return false;
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}
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}
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bool
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WebGLContext::ValidateDrawModeEnum(GLenum mode, const char* info)
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{
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switch (mode) {
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case LOCAL_GL_TRIANGLES:
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case LOCAL_GL_TRIANGLE_STRIP:
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case LOCAL_GL_TRIANGLE_FAN:
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case LOCAL_GL_POINTS:
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case LOCAL_GL_LINE_STRIP:
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case LOCAL_GL_LINE_LOOP:
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case LOCAL_GL_LINES:
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return true;
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default:
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ErrorInvalidEnumInfo(info, mode);
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return false;
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}
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}
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bool
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WebGLContext::ValidateFramebufferAttachment(const WebGLFramebuffer* fb, GLenum attachment,
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const char* funcName,
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bool badColorAttachmentIsInvalidOp)
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{
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if (!fb) {
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switch (attachment) {
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case LOCAL_GL_COLOR:
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case LOCAL_GL_DEPTH:
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case LOCAL_GL_STENCIL:
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return true;
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default:
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ErrorInvalidEnum("%s: attachment: invalid enum value 0x%x.",
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funcName, attachment);
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return false;
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}
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}
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if (attachment == LOCAL_GL_DEPTH_ATTACHMENT ||
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attachment == LOCAL_GL_STENCIL_ATTACHMENT ||
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attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT)
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{
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return true;
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}
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if (attachment >= LOCAL_GL_COLOR_ATTACHMENT0 &&
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attachment <= LastColorAttachmentEnum())
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{
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return true;
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}
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if (badColorAttachmentIsInvalidOp &&
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attachment >= LOCAL_GL_COLOR_ATTACHMENT0)
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{
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const uint32_t offset = attachment - LOCAL_GL_COLOR_ATTACHMENT0;
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ErrorInvalidOperation("%s: Bad color attachment: COLOR_ATTACHMENT%u. (0x%04x)",
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funcName, offset, attachment);
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} else {
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ErrorInvalidEnum("%s: attachment: Bad attachment 0x%x.", funcName, attachment);
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}
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return false;
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}
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/**
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* Return true if pname is valid for GetSamplerParameter calls.
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*/
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bool
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WebGLContext::ValidateSamplerParameterName(GLenum pname, const char* info)
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{
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switch (pname) {
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case LOCAL_GL_TEXTURE_MIN_FILTER:
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case LOCAL_GL_TEXTURE_MAG_FILTER:
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case LOCAL_GL_TEXTURE_WRAP_S:
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case LOCAL_GL_TEXTURE_WRAP_T:
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case LOCAL_GL_TEXTURE_WRAP_R:
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case LOCAL_GL_TEXTURE_MIN_LOD:
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case LOCAL_GL_TEXTURE_MAX_LOD:
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case LOCAL_GL_TEXTURE_COMPARE_MODE:
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case LOCAL_GL_TEXTURE_COMPARE_FUNC:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid pname: %s", info, EnumName(pname));
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return false;
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}
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}
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/**
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* Return true if pname and param are valid combination for SamplerParameter calls.
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*/
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bool
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WebGLContext::ValidateSamplerParameterParams(GLenum pname, const WebGLIntOrFloat& param, const char* info)
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{
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const GLenum p = param.AsInt();
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switch (pname) {
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case LOCAL_GL_TEXTURE_MIN_FILTER:
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switch (p) {
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case LOCAL_GL_NEAREST:
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case LOCAL_GL_LINEAR:
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case LOCAL_GL_NEAREST_MIPMAP_NEAREST:
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case LOCAL_GL_NEAREST_MIPMAP_LINEAR:
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case LOCAL_GL_LINEAR_MIPMAP_NEAREST:
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case LOCAL_GL_LINEAR_MIPMAP_LINEAR:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid param: %s", info, EnumName(p));
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return false;
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}
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case LOCAL_GL_TEXTURE_MAG_FILTER:
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switch (p) {
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case LOCAL_GL_NEAREST:
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case LOCAL_GL_LINEAR:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid param: %s", info, EnumName(p));
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return false;
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}
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case LOCAL_GL_TEXTURE_WRAP_S:
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case LOCAL_GL_TEXTURE_WRAP_T:
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case LOCAL_GL_TEXTURE_WRAP_R:
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switch (p) {
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case LOCAL_GL_CLAMP_TO_EDGE:
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case LOCAL_GL_REPEAT:
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case LOCAL_GL_MIRRORED_REPEAT:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid param: %s", info, EnumName(p));
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return false;
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}
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case LOCAL_GL_TEXTURE_MIN_LOD:
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case LOCAL_GL_TEXTURE_MAX_LOD:
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return true;
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case LOCAL_GL_TEXTURE_COMPARE_MODE:
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switch (param.AsInt()) {
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case LOCAL_GL_NONE:
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case LOCAL_GL_COMPARE_REF_TO_TEXTURE:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid param: %s", info, EnumName(p));
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return false;
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}
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case LOCAL_GL_TEXTURE_COMPARE_FUNC:
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switch (p) {
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case LOCAL_GL_LEQUAL:
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case LOCAL_GL_GEQUAL:
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case LOCAL_GL_LESS:
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case LOCAL_GL_GREATER:
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case LOCAL_GL_EQUAL:
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case LOCAL_GL_NOTEQUAL:
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case LOCAL_GL_ALWAYS:
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case LOCAL_GL_NEVER:
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return true;
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default:
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ErrorInvalidEnum("%s: invalid param: %s", info, EnumName(p));
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return false;
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}
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default:
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ErrorInvalidEnum("%s: invalid pname: %s", info, EnumName(pname));
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return false;
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}
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}
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bool
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WebGLContext::ValidateUniformLocation(WebGLUniformLocation* loc, const char* funcName)
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{
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/* GLES 2.0.25, p38:
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* If the value of location is -1, the Uniform* commands will silently
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* ignore the data passed in, and the current uniform values will not be
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* changed.
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*/
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if (!loc)
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return false;
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if (!ValidateObject(funcName, loc))
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return false;
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if (!mCurrentProgram) {
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ErrorInvalidOperation("%s: No program is currently bound.", funcName);
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return false;
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}
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return loc->ValidateForProgram(mCurrentProgram, this, funcName);
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}
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bool
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WebGLContext::ValidateAttribArraySetter(const char* name, uint32_t setterElemSize,
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uint32_t arrayLength)
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{
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if (IsContextLost())
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return false;
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if (arrayLength < setterElemSize) {
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ErrorInvalidValue("%s: Array must have >= %d elements.", name,
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setterElemSize);
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return false;
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}
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return true;
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}
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bool
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WebGLContext::ValidateUniformSetter(WebGLUniformLocation* loc,
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uint8_t setterElemSize, GLenum setterType,
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const char* funcName, GLuint* out_rawLoc)
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{
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if (IsContextLost())
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return false;
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if (!ValidateUniformLocation(loc, funcName))
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return false;
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if (!loc->ValidateSizeAndType(setterElemSize, setterType, this, funcName))
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return false;
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*out_rawLoc = loc->mLoc;
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return true;
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}
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bool
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WebGLContext::ValidateUniformArraySetter(WebGLUniformLocation* loc,
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uint8_t setterElemSize,
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GLenum setterType,
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size_t setterArraySize,
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const char* funcName,
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GLuint* const out_rawLoc,
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GLsizei* const out_numElementsToUpload)
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{
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if (IsContextLost())
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return false;
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if (!ValidateUniformLocation(loc, funcName))
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return false;
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if (!loc->ValidateSizeAndType(setterElemSize, setterType, this, funcName))
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return false;
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if (!loc->ValidateArrayLength(setterElemSize, setterArraySize, this, funcName))
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return false;
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MOZ_ASSERT((size_t)loc->mActiveInfo->mElemCount > loc->mArrayIndex);
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size_t uniformElemCount = loc->mActiveInfo->mElemCount - loc->mArrayIndex;
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*out_rawLoc = loc->mLoc;
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*out_numElementsToUpload = std::min(uniformElemCount, setterArraySize / setterElemSize);
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return true;
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}
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bool
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WebGLContext::ValidateUniformMatrixArraySetter(WebGLUniformLocation* loc,
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uint8_t setterCols,
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uint8_t setterRows,
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GLenum setterType,
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size_t setterArraySize,
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bool setterTranspose,
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const char* funcName,
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GLuint* const out_rawLoc,
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GLsizei* const out_numElementsToUpload)
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{
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uint8_t setterElemSize = setterCols * setterRows;
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if (IsContextLost())
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return false;
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if (!ValidateUniformLocation(loc, funcName))
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return false;
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if (!loc->ValidateSizeAndType(setterElemSize, setterType, this, funcName))
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return false;
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if (!loc->ValidateArrayLength(setterElemSize, setterArraySize, this, funcName))
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return false;
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if (!ValidateUniformMatrixTranspose(setterTranspose, funcName))
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return false;
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MOZ_ASSERT((size_t)loc->mActiveInfo->mElemCount > loc->mArrayIndex);
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size_t uniformElemCount = loc->mActiveInfo->mElemCount - loc->mArrayIndex;
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*out_rawLoc = loc->mLoc;
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*out_numElementsToUpload = std::min(uniformElemCount, setterArraySize / setterElemSize);
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return true;
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}
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bool
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WebGLContext::ValidateAttribIndex(GLuint index, const char* info)
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{
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bool valid = (index < MaxVertexAttribs());
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|
|
|
if (!valid) {
|
|
if (index == GLuint(-1)) {
|
|
ErrorInvalidValue("%s: -1 is not a valid `index`. This value"
|
|
" probably comes from a getAttribLocation()"
|
|
" call, where this return value -1 means"
|
|
" that the passed name didn't correspond to"
|
|
" an active attribute in the specified"
|
|
" program.", info);
|
|
} else {
|
|
ErrorInvalidValue("%s: `index` must be less than"
|
|
" MAX_VERTEX_ATTRIBS.", info);
|
|
}
|
|
}
|
|
|
|
return valid;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::ValidateAttribPointer(bool integerMode, GLuint index, GLint size, GLenum type,
|
|
WebGLboolean normalized, GLsizei stride,
|
|
WebGLintptr byteOffset, const char* info)
|
|
{
|
|
WebGLBuffer* buffer = mBoundArrayBuffer;
|
|
if (!buffer) {
|
|
ErrorInvalidOperation("%s: must have valid GL_ARRAY_BUFFER binding", info);
|
|
return false;
|
|
}
|
|
|
|
GLsizei requiredAlignment = 0;
|
|
if (!ValidateAttribPointerType(integerMode, type, &requiredAlignment, info))
|
|
return false;
|
|
|
|
// requiredAlignment should always be a power of two
|
|
MOZ_ASSERT(IsPowerOfTwo(requiredAlignment));
|
|
GLsizei requiredAlignmentMask = requiredAlignment - 1;
|
|
|
|
if (size < 1 || size > 4) {
|
|
ErrorInvalidValue("%s: invalid element size", info);
|
|
return false;
|
|
}
|
|
|
|
// see WebGL spec section 6.6 "Vertex Attribute Data Stride"
|
|
if (stride < 0 || stride > 255) {
|
|
ErrorInvalidValue("%s: negative or too large stride", info);
|
|
return false;
|
|
}
|
|
|
|
if (byteOffset < 0) {
|
|
ErrorInvalidValue("%s: negative offset", info);
|
|
return false;
|
|
}
|
|
|
|
if (stride & requiredAlignmentMask) {
|
|
ErrorInvalidOperation("%s: stride doesn't satisfy the alignment "
|
|
"requirement of given type", info);
|
|
return false;
|
|
}
|
|
|
|
if (byteOffset & requiredAlignmentMask) {
|
|
ErrorInvalidOperation("%s: byteOffset doesn't satisfy the alignment "
|
|
"requirement of given type", info);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::ValidateStencilParamsForDrawCall()
|
|
{
|
|
const char msg[] = "%s set different front and back stencil %s. Drawing in"
|
|
" this configuration is not allowed.";
|
|
|
|
if (mStencilRefFront != mStencilRefBack) {
|
|
ErrorInvalidOperation(msg, "stencilFuncSeparate", "reference values");
|
|
return false;
|
|
}
|
|
|
|
if (mStencilValueMaskFront != mStencilValueMaskBack) {
|
|
ErrorInvalidOperation(msg, "stencilFuncSeparate", "value masks");
|
|
return false;
|
|
}
|
|
|
|
if (mStencilWriteMaskFront != mStencilWriteMaskBack) {
|
|
ErrorInvalidOperation(msg, "stencilMaskSeparate", "write masks");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline int32_t
|
|
FloorPOT(int32_t x)
|
|
{
|
|
MOZ_ASSERT(x > 0);
|
|
int32_t pot = 1;
|
|
while (pot < 0x40000000) {
|
|
if (x < pot*2)
|
|
break;
|
|
pot *= 2;
|
|
}
|
|
return pot;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::InitAndValidateGL(FailureReason* const out_failReason)
|
|
{
|
|
MOZ_RELEASE_ASSERT(gl, "GFX: GL not initialized");
|
|
|
|
// Unconditionally create a new format usage authority. This is
|
|
// important when restoring contexts and extensions need to add
|
|
// formats back into the authority.
|
|
mFormatUsage = CreateFormatUsage(gl);
|
|
if (!mFormatUsage) {
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_FORMAT",
|
|
"Failed to create mFormatUsage." };
|
|
return false;
|
|
}
|
|
|
|
GLenum error = gl->fGetError();
|
|
if (error != LOCAL_GL_NO_ERROR) {
|
|
const nsPrintfCString reason("GL error 0x%x occurred during OpenGL context"
|
|
" initialization, before WebGL initialization!",
|
|
error);
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_GLERR_1", reason };
|
|
return false;
|
|
}
|
|
|
|
mMinCapability = gfxPrefs::WebGLMinCapabilityMode();
|
|
mDisableExtensions = gfxPrefs::WebGLDisableExtensions();
|
|
mLoseContextOnMemoryPressure = gfxPrefs::WebGLLoseContextOnMemoryPressure();
|
|
mCanLoseContextInForeground = gfxPrefs::WebGLCanLoseContextInForeground();
|
|
mRestoreWhenVisible = gfxPrefs::WebGLRestoreWhenVisible();
|
|
|
|
if (MinCapabilityMode())
|
|
mDisableFragHighP = true;
|
|
|
|
// These are the default values, see 6.2 State tables in the
|
|
// OpenGL ES 2.0.25 spec.
|
|
mColorWriteMask[0] = 1;
|
|
mColorWriteMask[1] = 1;
|
|
mColorWriteMask[2] = 1;
|
|
mColorWriteMask[3] = 1;
|
|
mDepthWriteMask = 1;
|
|
mColorClearValue[0] = 0.f;
|
|
mColorClearValue[1] = 0.f;
|
|
mColorClearValue[2] = 0.f;
|
|
mColorClearValue[3] = 0.f;
|
|
mDepthClearValue = 1.f;
|
|
mStencilClearValue = 0;
|
|
mStencilRefFront = 0;
|
|
mStencilRefBack = 0;
|
|
|
|
/*
|
|
// Technically, we should be setting mStencil[...] values to
|
|
// `allOnes`, but either ANGLE breaks or the SGX540s on Try break.
|
|
GLuint stencilBits = 0;
|
|
gl->GetUIntegerv(LOCAL_GL_STENCIL_BITS, &stencilBits);
|
|
GLuint allOnes = ~(UINT32_MAX << stencilBits);
|
|
mStencilValueMaskFront = allOnes;
|
|
mStencilValueMaskBack = allOnes;
|
|
mStencilWriteMaskFront = allOnes;
|
|
mStencilWriteMaskBack = allOnes;
|
|
*/
|
|
|
|
gl->GetUIntegerv(LOCAL_GL_STENCIL_VALUE_MASK, &mStencilValueMaskFront);
|
|
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_VALUE_MASK, &mStencilValueMaskBack);
|
|
gl->GetUIntegerv(LOCAL_GL_STENCIL_WRITEMASK, &mStencilWriteMaskFront);
|
|
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_WRITEMASK, &mStencilWriteMaskBack);
|
|
|
|
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_VALUE_MASK, mStencilValueMaskFront);
|
|
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_VALUE_MASK, mStencilValueMaskBack);
|
|
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_WRITEMASK, mStencilWriteMaskFront);
|
|
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_WRITEMASK, mStencilWriteMaskBack);
|
|
|
|
mDitherEnabled = true;
|
|
mRasterizerDiscardEnabled = false;
|
|
mScissorTestEnabled = false;
|
|
|
|
// Bindings, etc.
|
|
mActiveTexture = 0;
|
|
mDefaultFB_DrawBuffer0 = LOCAL_GL_BACK;
|
|
|
|
mEmitContextLostErrorOnce = true;
|
|
mWebGLError = LOCAL_GL_NO_ERROR;
|
|
mUnderlyingGLError = LOCAL_GL_NO_ERROR;
|
|
|
|
mBound2DTextures.Clear();
|
|
mBoundCubeMapTextures.Clear();
|
|
mBound3DTextures.Clear();
|
|
mBound2DArrayTextures.Clear();
|
|
mBoundSamplers.Clear();
|
|
|
|
mBoundArrayBuffer = nullptr;
|
|
mBoundTransformFeedbackBuffer = nullptr;
|
|
mCurrentProgram = nullptr;
|
|
|
|
mBoundDrawFramebuffer = nullptr;
|
|
mBoundReadFramebuffer = nullptr;
|
|
mBoundRenderbuffer = nullptr;
|
|
|
|
MakeContextCurrent();
|
|
|
|
// For OpenGL compat. profiles, we always keep vertex attrib 0 array enabled.
|
|
if (gl->IsCompatibilityProfile())
|
|
gl->fEnableVertexAttribArray(0);
|
|
|
|
if (MinCapabilityMode())
|
|
mGLMaxVertexAttribs = MINVALUE_GL_MAX_VERTEX_ATTRIBS;
|
|
else
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_ATTRIBS, &mGLMaxVertexAttribs);
|
|
|
|
if (mGLMaxVertexAttribs < 8) {
|
|
const nsPrintfCString reason("GL_MAX_VERTEX_ATTRIBS: %d is < 8!",
|
|
mGLMaxVertexAttribs);
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_V_ATRB", reason };
|
|
return false;
|
|
}
|
|
|
|
// Note: GL_MAX_TEXTURE_UNITS is fixed at 4 for most desktop hardware,
|
|
// even though the hardware supports much more. The
|
|
// GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS value is the accurate value.
|
|
if (MinCapabilityMode())
|
|
mGLMaxTextureUnits = MINVALUE_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS;
|
|
else
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &mGLMaxTextureUnits);
|
|
|
|
if (mGLMaxTextureUnits < 8) {
|
|
const nsPrintfCString reason("GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS: %d is < 8!",
|
|
mGLMaxTextureUnits);
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_T_UNIT", reason };
|
|
return false;
|
|
}
|
|
|
|
mBound2DTextures.SetLength(mGLMaxTextureUnits);
|
|
mBoundCubeMapTextures.SetLength(mGLMaxTextureUnits);
|
|
mBound3DTextures.SetLength(mGLMaxTextureUnits);
|
|
mBound2DArrayTextures.SetLength(mGLMaxTextureUnits);
|
|
mBoundSamplers.SetLength(mGLMaxTextureUnits);
|
|
|
|
////////////////
|
|
|
|
if (MinCapabilityMode()) {
|
|
mImplMaxTextureSize = MINVALUE_GL_MAX_TEXTURE_SIZE;
|
|
mImplMaxCubeMapTextureSize = MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE;
|
|
mImplMaxRenderbufferSize = MINVALUE_GL_MAX_RENDERBUFFER_SIZE;
|
|
|
|
mImplMax3DTextureSize = MINVALUE_GL_MAX_3D_TEXTURE_SIZE;
|
|
mImplMaxArrayTextureLayers = MINVALUE_GL_MAX_ARRAY_TEXTURE_LAYERS;
|
|
|
|
mGLMaxTextureImageUnits = MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS;
|
|
mGLMaxVertexTextureImageUnits = MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS;
|
|
} else {
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE, (GLint*)&mImplMaxTextureSize);
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE, (GLint*)&mImplMaxCubeMapTextureSize);
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_RENDERBUFFER_SIZE, (GLint*)&mImplMaxRenderbufferSize);
|
|
|
|
if (!gl->GetPotentialInteger(LOCAL_GL_MAX_3D_TEXTURE_SIZE, (GLint*)&mImplMax3DTextureSize))
|
|
mImplMax3DTextureSize = 0;
|
|
if (!gl->GetPotentialInteger(LOCAL_GL_MAX_ARRAY_TEXTURE_LAYERS, (GLint*)&mImplMaxArrayTextureLayers))
|
|
mImplMaxArrayTextureLayers = 0;
|
|
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS, &mGLMaxTextureImageUnits);
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &mGLMaxVertexTextureImageUnits);
|
|
}
|
|
|
|
// If we don't support a target, its max size is 0. We should only floor-to-POT if the
|
|
// value if it's non-zero. (NB log2(0) is -Inf, so zero isn't an integer power-of-two)
|
|
const auto fnFloorPOTIfSupported = [](uint32_t& val) {
|
|
if (val) {
|
|
val = FloorPOT(val);
|
|
}
|
|
};
|
|
|
|
fnFloorPOTIfSupported(mImplMaxTextureSize);
|
|
fnFloorPOTIfSupported(mImplMaxCubeMapTextureSize);
|
|
fnFloorPOTIfSupported(mImplMaxRenderbufferSize);
|
|
|
|
fnFloorPOTIfSupported(mImplMax3DTextureSize);
|
|
fnFloorPOTIfSupported(mImplMaxArrayTextureLayers);
|
|
|
|
////////////////
|
|
|
|
mGLMaxColorAttachments = 1;
|
|
mGLMaxDrawBuffers = 1;
|
|
gl->GetPotentialInteger(LOCAL_GL_MAX_COLOR_ATTACHMENTS,
|
|
(GLint*)&mGLMaxColorAttachments);
|
|
gl->GetPotentialInteger(LOCAL_GL_MAX_DRAW_BUFFERS, (GLint*)&mGLMaxDrawBuffers);
|
|
|
|
if (MinCapabilityMode()) {
|
|
mGLMaxColorAttachments = std::min(mGLMaxColorAttachments,
|
|
kMinMaxColorAttachments);
|
|
mGLMaxDrawBuffers = std::min(mGLMaxDrawBuffers, kMinMaxDrawBuffers);
|
|
}
|
|
|
|
if (IsWebGL2()) {
|
|
mImplMaxColorAttachments = mGLMaxColorAttachments;
|
|
mImplMaxDrawBuffers = std::min(mGLMaxDrawBuffers, mImplMaxColorAttachments);
|
|
} else {
|
|
mImplMaxColorAttachments = 1;
|
|
mImplMaxDrawBuffers = 1;
|
|
}
|
|
|
|
////////////////
|
|
|
|
if (MinCapabilityMode()) {
|
|
mGLMaxFragmentUniformVectors = MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS;
|
|
mGLMaxVertexUniformVectors = MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS;
|
|
mGLMaxVaryingVectors = MINVALUE_GL_MAX_VARYING_VECTORS;
|
|
} else {
|
|
if (gl->IsSupported(gl::GLFeature::ES2_compatibility)) {
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS, &mGLMaxFragmentUniformVectors);
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS, &mGLMaxVertexUniformVectors);
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_VARYING_VECTORS, &mGLMaxVaryingVectors);
|
|
} else {
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &mGLMaxFragmentUniformVectors);
|
|
mGLMaxFragmentUniformVectors /= 4;
|
|
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_COMPONENTS, &mGLMaxVertexUniformVectors);
|
|
mGLMaxVertexUniformVectors /= 4;
|
|
|
|
/* We are now going to try to read GL_MAX_VERTEX_OUTPUT_COMPONENTS
|
|
* and GL_MAX_FRAGMENT_INPUT_COMPONENTS, however these constants
|
|
* only entered the OpenGL standard at OpenGL 3.2. So we will try
|
|
* reading, and check OpenGL error for INVALID_ENUM.
|
|
*
|
|
* On the public_webgl list, "problematic GetParameter pnames"
|
|
* thread, the following formula was given:
|
|
* maxVaryingVectors = min(GL_MAX_VERTEX_OUTPUT_COMPONENTS,
|
|
* GL_MAX_FRAGMENT_INPUT_COMPONENTS) / 4
|
|
*/
|
|
GLint maxVertexOutputComponents = 0;
|
|
GLint maxFragmentInputComponents = 0;
|
|
|
|
const bool ok = (gl->GetPotentialInteger(LOCAL_GL_MAX_VERTEX_OUTPUT_COMPONENTS,
|
|
&maxVertexOutputComponents) &&
|
|
gl->GetPotentialInteger(LOCAL_GL_MAX_FRAGMENT_INPUT_COMPONENTS,
|
|
&maxFragmentInputComponents));
|
|
|
|
if (ok) {
|
|
mGLMaxVaryingVectors = std::min(maxVertexOutputComponents,
|
|
maxFragmentInputComponents) / 4;
|
|
} else {
|
|
mGLMaxVaryingVectors = 16;
|
|
// 16 = 64/4, and 64 is the min value for
|
|
// maxVertexOutputComponents in the OpenGL 3.2 spec.
|
|
}
|
|
}
|
|
}
|
|
|
|
if (gl->IsCompatibilityProfile()) {
|
|
// gl_PointSize is always available in ES2 GLSL, but has to be
|
|
// specifically enabled on desktop GLSL.
|
|
gl->fEnable(LOCAL_GL_VERTEX_PROGRAM_POINT_SIZE);
|
|
|
|
/* gl_PointCoord is always available in ES2 GLSL and in newer desktop
|
|
* GLSL versions, but apparently not in OpenGL 2 and apparently not (due
|
|
* to a driver bug) on certain NVIDIA setups. See:
|
|
* http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=261472
|
|
*
|
|
* Note that this used to cause crashes on old ATI drivers... Hopefully
|
|
* not a significant anymore. See bug 602183.
|
|
*/
|
|
gl->fEnable(LOCAL_GL_POINT_SPRITE);
|
|
}
|
|
|
|
#ifdef XP_MACOSX
|
|
if (gl->WorkAroundDriverBugs() &&
|
|
gl->Vendor() == gl::GLVendor::ATI &&
|
|
!nsCocoaFeatures::IsAtLeastVersion(10,9))
|
|
{
|
|
// The Mac ATI driver, in all known OSX version up to and including
|
|
// 10.8, renders points sprites upside-down. (Apple bug 11778921)
|
|
gl->fPointParameterf(LOCAL_GL_POINT_SPRITE_COORD_ORIGIN,
|
|
LOCAL_GL_LOWER_LEFT);
|
|
}
|
|
#endif
|
|
|
|
if (gl->IsSupported(gl::GLFeature::seamless_cube_map_opt_in)) {
|
|
gl->fEnable(LOCAL_GL_TEXTURE_CUBE_MAP_SEAMLESS);
|
|
}
|
|
|
|
// Check the shader validator pref
|
|
mBypassShaderValidation = gfxPrefs::WebGLBypassShaderValidator();
|
|
|
|
// initialize shader translator
|
|
if (!ShInitialize()) {
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_GLSL",
|
|
"GLSL translator initialization failed!" };
|
|
return false;
|
|
}
|
|
|
|
// Mesa can only be detected with the GL_VERSION string, of the form
|
|
// "2.1 Mesa 7.11.0"
|
|
const char* versionStr = (const char*)(gl->fGetString(LOCAL_GL_VERSION));
|
|
mIsMesa = strstr(versionStr, "Mesa");
|
|
|
|
// Notice that the point of calling fGetError here is not only to check for
|
|
// errors, but also to reset the error flags so that a subsequent WebGL
|
|
// getError call will give the correct result.
|
|
error = gl->fGetError();
|
|
if (error != LOCAL_GL_NO_ERROR) {
|
|
const nsPrintfCString reason("GL error 0x%x occurred during WebGL context"
|
|
" initialization!",
|
|
error);
|
|
*out_failReason = { "FEATURE_FAILURE_WEBGL_GLERR_2", reason };
|
|
return false;
|
|
}
|
|
|
|
if (IsWebGL2() &&
|
|
!InitWebGL2(out_failReason))
|
|
{
|
|
// Todo: Bug 898404: Only allow WebGL2 on GL>=3.0 on desktop GL.
|
|
return false;
|
|
}
|
|
|
|
// Default value for all disabled vertex attributes is [0, 0, 0, 1]
|
|
mVertexAttribType = MakeUnique<GLenum[]>(mGLMaxVertexAttribs);
|
|
for (int32_t index = 0; index < mGLMaxVertexAttribs; ++index) {
|
|
mVertexAttribType[index] = LOCAL_GL_FLOAT;
|
|
VertexAttrib4f(index, 0, 0, 0, 1);
|
|
}
|
|
|
|
mDefaultVertexArray = WebGLVertexArray::Create(this);
|
|
mDefaultVertexArray->mAttribs.SetLength(mGLMaxVertexAttribs);
|
|
mBoundVertexArray = mDefaultVertexArray;
|
|
|
|
// OpenGL core profiles remove the default VAO object from version
|
|
// 4.0.0. We create a default VAO for all core profiles,
|
|
// regardless of version.
|
|
//
|
|
// GL Spec 4.0.0:
|
|
// (https://www.opengl.org/registry/doc/glspec40.core.20100311.pdf)
|
|
// in Section E.2.2 "Removed Features", pg 397: "[...] The default
|
|
// vertex array object (the name zero) is also deprecated. [...]"
|
|
|
|
if (gl->IsCoreProfile()) {
|
|
MakeContextCurrent();
|
|
mDefaultVertexArray->GenVertexArray();
|
|
mDefaultVertexArray->BindVertexArray();
|
|
}
|
|
|
|
mPixelStore_FlipY = false;
|
|
mPixelStore_PremultiplyAlpha = false;
|
|
mPixelStore_ColorspaceConversion = BROWSER_DEFAULT_WEBGL;
|
|
|
|
// GLES 3.0.4, p259:
|
|
mPixelStore_UnpackImageHeight = 0;
|
|
mPixelStore_UnpackSkipImages = 0;
|
|
mPixelStore_UnpackRowLength = 0;
|
|
mPixelStore_UnpackSkipRows = 0;
|
|
mPixelStore_UnpackSkipPixels = 0;
|
|
mPixelStore_UnpackAlignment = 4;
|
|
mPixelStore_PackRowLength = 0;
|
|
mPixelStore_PackSkipRows = 0;
|
|
mPixelStore_PackSkipPixels = 0;
|
|
mPixelStore_PackAlignment = 4;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::ValidateFramebufferTarget(GLenum target,
|
|
const char* const info)
|
|
{
|
|
bool isValid = true;
|
|
switch (target) {
|
|
case LOCAL_GL_FRAMEBUFFER:
|
|
break;
|
|
|
|
case LOCAL_GL_DRAW_FRAMEBUFFER:
|
|
case LOCAL_GL_READ_FRAMEBUFFER:
|
|
isValid = IsWebGL2();
|
|
break;
|
|
|
|
default:
|
|
isValid = false;
|
|
break;
|
|
}
|
|
|
|
if (MOZ_LIKELY(isValid)) {
|
|
return true;
|
|
}
|
|
|
|
ErrorInvalidEnum("%s: Invalid target: %s (0x%04x).", info, EnumName(target),
|
|
target);
|
|
return false;
|
|
}
|
|
|
|
} // namespace mozilla
|