зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1774304 - Support simple format conversions when blitting. r=jrmuizel
Differential Revision: https://phabricator.services.mozilla.com/D150071
This commit is contained in:
Lee Salzman
Родитель
588bf8226f
Коммит
6c3fae5e86
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@ -2,6 +2,75 @@
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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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// Converts a pixel from a source format to a destination format. By default,
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// just return the value unchanged as for a simple copy.
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template <typename P, typename U>
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static ALWAYS_INLINE P convert_pixel(U src) {
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return src;
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}
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// R8 format maps to BGRA value 0,0,R,1. The byte order is endian independent,
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// but the shifts unfortunately depend on endianness.
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template <>
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ALWAYS_INLINE uint32_t convert_pixel<uint32_t>(uint8_t src) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return (uint32_t(src) << 16) | 0xFF000000;
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#else
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return (uint32_t(src) << 8) | 0x000000FF;
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#endif
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}
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// RG8 format maps to BGRA value 0,G,R,1.
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template <>
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ALWAYS_INLINE uint32_t convert_pixel<uint32_t>(uint16_t src) {
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uint32_t rg = src;
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return ((rg & 0x00FF) << 16) | (rg & 0xFF00) | 0xFF000000;
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#else
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return (rg & 0xFF00) | ((rg & 0x00FF) << 16) | 0x000000FF;
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#endif
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}
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// RGBA8 format maps to R.
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template <>
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ALWAYS_INLINE uint8_t convert_pixel<uint8_t>(uint32_t src) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return (src >> 16) & 0xFF;
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#else
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return (src >> 8) & 0xFF;
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#endif
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}
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// RGBA8 formats maps to R,G.
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template <>
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ALWAYS_INLINE uint16_t convert_pixel<uint16_t>(uint32_t src) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return ((src >> 16) & 0x00FF) | (src & 0xFF00);
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#else
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return (src & 0xFF00) | ((src >> 16) & 0x00FF);
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#endif
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}
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// R8 format maps to R,0.
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template <>
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ALWAYS_INLINE uint16_t convert_pixel<uint16_t>(uint8_t src) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return src;
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#else
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return uint16_t(src) << 8;
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#endif
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}
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// RG8 format maps to R.
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template <>
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ALWAYS_INLINE uint8_t convert_pixel<uint8_t>(uint16_t src) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return src & 0xFF;
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#else
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return src >> 8;
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#endif
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}
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template <bool COMPOSITE, typename P>
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static inline void copy_row(P* dst, const P* src, int span) {
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// No scaling, so just do a fast copy.
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@ -28,12 +97,12 @@ void copy_row<true, uint32_t>(uint32_t* dst, const uint32_t* src, int span) {
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}
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}
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template <bool COMPOSITE, typename P>
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static inline void scale_row(P* dst, int dstWidth, const P* src, int srcWidth,
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template <bool COMPOSITE, typename P, typename U>
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static inline void scale_row(P* dst, int dstWidth, const U* src, int srcWidth,
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int span, int frac) {
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// Do scaling with different source and dest widths.
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for (P* end = dst + span; dst < end; dst++) {
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*dst = *src;
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*dst = convert_pixel<P>(*src);
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// Step source according to width ratio.
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for (frac += srcWidth; frac >= dstWidth; frac -= dstWidth) {
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src++;
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@ -42,8 +111,9 @@ static inline void scale_row(P* dst, int dstWidth, const P* src, int srcWidth,
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}
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template <>
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void scale_row<true, uint32_t>(uint32_t* dst, int dstWidth, const uint32_t* src,
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int srcWidth, int span, int frac) {
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void scale_row<true, uint32_t, uint32_t>(uint32_t* dst, int dstWidth,
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const uint32_t* src, int srcWidth,
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int span, int frac) {
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// Do scaling with different source and dest widths.
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// Gather source pixels four at a time for better packing.
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auto* end = dst + span;
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@ -124,7 +194,6 @@ static NO_INLINE void scale_blit(Texture& srctex, const IntRect& srcReq,
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}
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// Calculate source and dest pointers from clamped offsets
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int bpp = srctex.bpp();
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int srcStride = srctex.stride();
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int destStride = dsttex.stride();
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char* dest = dsttex.sample_ptr(dstReq, dstBounds);
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@ -142,28 +211,64 @@ static NO_INLINE void scale_blit(Texture& srctex, const IntRect& srcReq,
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}
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int span = dstBounds.width();
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for (int rows = dstBounds.height(); rows > 0; rows--) {
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switch (bpp) {
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switch (srctex.bpp()) {
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case 1:
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switch (dsttex.bpp()) {
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case 2:
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scale_row<COMPOSITE>((uint16_t*)dest, dstWidth, (uint8_t*)src,
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srcWidth, span, fracX);
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break;
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case 4:
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scale_row<COMPOSITE>((uint32_t*)dest, dstWidth, (uint8_t*)src,
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srcWidth, span, fracX);
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break;
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default:
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if (srcWidth == dstWidth)
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copy_row<COMPOSITE>((uint8_t*)dest, (uint8_t*)src, span);
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else
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scale_row<COMPOSITE>((uint8_t*)dest, dstWidth, (uint8_t*)src,
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srcWidth, span, fracX);
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break;
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}
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break;
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case 2:
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switch (dsttex.bpp()) {
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case 1:
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scale_row<COMPOSITE>((uint8_t*)dest, dstWidth, (uint16_t*)src,
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srcWidth, span, fracX);
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break;
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case 4:
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scale_row<COMPOSITE>((uint32_t*)dest, dstWidth, (uint16_t*)src,
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srcWidth, span, fracX);
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break;
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default:
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if (srcWidth == dstWidth)
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copy_row<COMPOSITE>((uint16_t*)dest, (uint16_t*)src, span);
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else
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scale_row<COMPOSITE>((uint16_t*)dest, dstWidth, (uint16_t*)src,
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srcWidth, span, fracX);
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break;
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}
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break;
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case 4:
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switch (dsttex.bpp()) {
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case 1:
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scale_row<COMPOSITE>((uint8_t*)dest, dstWidth, (uint32_t*)src,
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srcWidth, span, fracX);
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break;
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case 2:
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scale_row<COMPOSITE>((uint16_t*)dest, dstWidth, (uint32_t*)src,
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srcWidth, span, fracX);
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break;
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default:
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if (srcWidth == dstWidth)
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copy_row<COMPOSITE>((uint32_t*)dest, (uint32_t*)src, span);
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else
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scale_row<COMPOSITE>((uint32_t*)dest, dstWidth, (uint32_t*)src,
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srcWidth, span, fracX);
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break;
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}
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break;
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default:
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assert(false);
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break;
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@ -312,6 +417,18 @@ static NO_INLINE void linear_blit(Texture& srctex, const IntRect& srcReq,
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}
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}
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// Whether the blit format is renderable.
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static inline bool is_renderable_format(GLenum format) {
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switch (format) {
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case GL_R8:
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case GL_RG8:
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case GL_RGBA8:
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return true;
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default:
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return false;
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}
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}
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extern "C" {
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void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
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@ -327,7 +444,12 @@ void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
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Texture& dsttex = ctx->textures[dstfb->color_attachment];
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if (!dsttex.buf) return;
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assert(!dsttex.locked);
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if (srctex.internal_format != dsttex.internal_format) {
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if (srctex.internal_format != dsttex.internal_format &&
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(!is_renderable_format(srctex.internal_format) ||
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!is_renderable_format(dsttex.internal_format))) {
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// If the internal formats don't match, then we may have to convert. Require
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// that the format is a simple renderable format to limit combinatoric
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// explosion for now.
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assert(false);
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return;
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}
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@ -349,8 +471,8 @@ void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
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prepare_texture(srctex);
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prepare_texture(dsttex, &dstReq);
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if (!srcReq.same_size(dstReq) && srctex.width >= 2 && filter == GL_LINEAR &&
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(srctex.internal_format == GL_RGBA8 || srctex.internal_format == GL_R8 ||
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srctex.internal_format == GL_RG8)) {
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srctex.internal_format == dsttex.internal_format &&
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is_renderable_format(srctex.internal_format)) {
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linear_blit(srctex, srcReq, dsttex, dstReq, false, invertY, dstReq);
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} else {
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scale_blit(srctex, srcReq, dsttex, dstReq, invertY, clipRect);
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