From 176eab9e8277db1549bfc6c9ae805c4e1858f0b0 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 25 Mar 2013 10:20:34 +0100 Subject: fontconfig mesa pixman xserver git update 25 Mar 2013 xserver commit 2967391c6d35f03121afa8003e0fb94b62495129 pixman commit d8ac35af1208a4fa4d67f03fee10b5449fb8495a fontconfig commit b561ff2016ce84eef3c81f16dfb0481be6a13f9b mesa commit 92b8a37fdfff9e83f39b8885f51ed2f60326ab6a --- mesalib/src/mesa/main/readpix.c | 284 ++++++++++++++++++++++++++++++++-------- 1 file changed, 232 insertions(+), 52 deletions(-) (limited to 'mesalib/src/mesa/main/readpix.c') diff --git a/mesalib/src/mesa/main/readpix.c b/mesalib/src/mesa/main/readpix.c index 2f130ae9a..d3d09dea3 100644 --- a/mesalib/src/mesa/main/readpix.c +++ b/mesalib/src/mesa/main/readpix.c @@ -41,11 +41,212 @@ /** - * Tries to implement glReadPixels() of GL_DEPTH_COMPONENT using memcpy of the - * mapping. + * Return true if the conversion L=R+G+B is needed. */ static GLboolean -fast_read_depth_pixels( struct gl_context *ctx, +need_rgb_to_luminance_conversion(gl_format texFormat, GLenum format) +{ + GLenum baseTexFormat = _mesa_get_format_base_format(texFormat); + + return (baseTexFormat == GL_RG || + baseTexFormat == GL_RGB || + baseTexFormat == GL_RGBA) && + (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA); +} + + +/** + * Return transfer op flags for this ReadPixels operation. + */ +static GLbitfield +get_readpixels_transfer_ops(const struct gl_context *ctx, gl_format texFormat, + GLenum format, GLenum type, GLboolean uses_blit) +{ + GLbitfield transferOps = ctx->_ImageTransferState; + + if (format == GL_DEPTH_COMPONENT || + format == GL_DEPTH_STENCIL || + format == GL_STENCIL_INDEX) { + return 0; + } + + /* Pixel transfer ops (scale, bias, table lookup) do not apply + * to integer formats. + */ + if (_mesa_is_enum_format_integer(format)) { + return 0; + } + + if (uses_blit) { + /* For blit-based ReadPixels packing, the clamping is done automatically + * unless the type is float. */ + if (ctx->Color._ClampReadColor == GL_TRUE && + (type == GL_FLOAT || type == GL_HALF_FLOAT)) { + transferOps |= IMAGE_CLAMP_BIT; + } + } + else { + /* For CPU-based ReadPixels packing, the clamping must always be done + * for non-float types, */ + if (ctx->Color._ClampReadColor == GL_TRUE || + (type != GL_FLOAT && type != GL_HALF_FLOAT)) { + transferOps |= IMAGE_CLAMP_BIT; + } + } + + /* If the format is unsigned normalized, we can ignore clamping + * because the values are already in the range [0,1] so it won't + * have any effect anyway. + */ + if (_mesa_get_format_datatype(texFormat) == GL_UNSIGNED_NORMALIZED && + !need_rgb_to_luminance_conversion(texFormat, format)) { + transferOps &= ~IMAGE_CLAMP_BIT; + } + + return transferOps; +} + + +/** + * Return true if memcpy cannot be used for ReadPixels. + * + * If uses_blit is true, the function returns true if a simple 3D engine blit + * cannot be used for ReadPixels packing. + * + * NOTE: This doesn't take swizzling and format conversions between + * the readbuffer and the pixel pack buffer into account. + */ +GLboolean +_mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format, + GLenum type, GLboolean uses_blit) +{ + struct gl_renderbuffer *rb = + _mesa_get_read_renderbuffer_for_format(ctx, format); + GLenum srcType; + + ASSERT(rb); + + /* There are different rules depending on the base format. */ + switch (format) { + case GL_DEPTH_STENCIL: + return !_mesa_has_depthstencil_combined(ctx->ReadBuffer) || + ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f || + ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset || + ctx->Pixel.MapStencilFlag; + + case GL_DEPTH_COMPONENT: + return ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f; + + case GL_STENCIL_INDEX: + return ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset || + ctx->Pixel.MapStencilFlag; + + default: + /* Color formats. */ + if (need_rgb_to_luminance_conversion(rb->Format, format)) { + return GL_TRUE; + } + + /* Conversion between signed and unsigned integers needs masking + * (it isn't just memcpy). */ + srcType = _mesa_get_format_datatype(rb->Format); + + if ((srcType == GL_INT && + (type == GL_UNSIGNED_INT || + type == GL_UNSIGNED_SHORT || + type == GL_UNSIGNED_BYTE)) || + (srcType == GL_UNSIGNED_INT && + (type == GL_INT || + type == GL_SHORT || + type == GL_BYTE))) { + return GL_TRUE; + } + + /* And finally, see if there are any transfer ops. */ + return get_readpixels_transfer_ops(ctx, rb->Format, format, type, + uses_blit) != 0; + } + return GL_FALSE; +} + + +static GLboolean +readpixels_can_use_memcpy(const struct gl_context *ctx, GLenum format, GLenum type, + const struct gl_pixelstore_attrib *packing) +{ + struct gl_renderbuffer *rb = + _mesa_get_read_renderbuffer_for_format(ctx, format); + + ASSERT(rb); + + if (_mesa_readpixels_needs_slow_path(ctx, format, type, GL_FALSE)) { + return GL_FALSE; + } + + /* The base internal format and the base Mesa format must match. */ + if (rb->_BaseFormat != _mesa_get_format_base_format(rb->Format)) { + return GL_FALSE; + } + + /* The Mesa format must match the input format and type. */ + if (!_mesa_format_matches_format_and_type(rb->Format, format, type, + packing->SwapBytes)) { + return GL_FALSE; + } + + return GL_TRUE; +} + + +static GLboolean +readpixels_memcpy(struct gl_context *ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + GLvoid *pixels, + const struct gl_pixelstore_attrib *packing) +{ + struct gl_renderbuffer *rb = + _mesa_get_read_renderbuffer_for_format(ctx, format); + GLubyte *dst, *map; + int dstStride, stride, j, texelBytes; + + /* Fail if memcpy cannot be used. */ + if (!readpixels_can_use_memcpy(ctx, format, type, packing)) { + return GL_FALSE; + } + + dstStride = _mesa_image_row_stride(packing, width, format, type); + dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, + format, type, 0, 0); + + ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT, + &map, &stride); + if (!map) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); + return GL_TRUE; /* don't bother trying the slow path */ + } + + texelBytes = _mesa_get_format_bytes(rb->Format); + + /* memcpy*/ + for (j = 0; j < height; j++) { + memcpy(dst, map, width * texelBytes); + dst += dstStride; + map += stride; + } + + ctx->Driver.UnmapRenderbuffer(ctx, rb); + return GL_TRUE; +} + + +/** + * Optimized path for conversion of depth values to GL_DEPTH_COMPONENT, + * GL_UNSIGNED_INT. + */ +static GLboolean +read_uint_depth_pixels( struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid *pixels, @@ -65,10 +266,6 @@ fast_read_depth_pixels( struct gl_context *ctx, if (_mesa_get_format_datatype(rb->Format) != GL_UNSIGNED_NORMALIZED) return GL_FALSE; - if (!((type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16) || - type == GL_UNSIGNED_INT)) - return GL_FALSE; - ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT, &map, &stride); @@ -82,12 +279,7 @@ fast_read_depth_pixels( struct gl_context *ctx, GL_DEPTH_COMPONENT, type, 0, 0); for (j = 0; j < height; j++) { - if (type == GL_UNSIGNED_INT) { - _mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst); - } else { - ASSERT(type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16); - memcpy(dst, map, width * 2); - } + _mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst); map += stride; dst += dstStride; @@ -123,8 +315,10 @@ read_depth_pixels( struct gl_context *ctx, ASSERT(x + width <= (GLint) rb->Width); ASSERT(y + height <= (GLint) rb->Height); - if (fast_read_depth_pixels(ctx, x, y, width, height, type, pixels, packing)) + if (type == GL_UNSIGNED_INT && + read_uint_depth_pixels(ctx, x, y, width, height, type, pixels, packing)) { return; + } dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type); dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, @@ -212,21 +406,20 @@ read_stencil_pixels( struct gl_context *ctx, /** - * Try to do glReadPixels of RGBA data using a simple memcpy or swizzle. + * Try to do glReadPixels of RGBA data using swizzle. * \return GL_TRUE if successful, GL_FALSE otherwise (use the slow path) */ static GLboolean -fast_read_rgba_pixels_memcpy( struct gl_context *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - GLvoid *pixels, - const struct gl_pixelstore_attrib *packing, - GLbitfield transferOps ) +read_rgba_pixels_swizzle(struct gl_context *ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + GLvoid *pixels, + const struct gl_pixelstore_attrib *packing) { struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; GLubyte *dst, *map; - int dstStride, stride, j, texelBytes; + int dstStride, stride, j; GLboolean swizzle_rb = GL_FALSE, copy_xrgb = GL_FALSE; /* XXX we could check for other swizzle/special cases here as needed */ @@ -242,19 +435,9 @@ fast_read_rgba_pixels_memcpy( struct gl_context *ctx, !ctx->Pack.SwapBytes) { copy_xrgb = GL_TRUE; } - else if (!_mesa_format_matches_format_and_type(rb->Format, format, type, - ctx->Pack.SwapBytes)) - return GL_FALSE; - - /* If the format is unsigned normalized then we can ignore clamping - * because the values are already in the range [0,1] so it won't - * have any effect anyway. - */ - if (_mesa_get_format_datatype(rb->Format) == GL_UNSIGNED_NORMALIZED) - transferOps &= ~IMAGE_CLAMP_BIT; - - if (transferOps) + else { return GL_FALSE; + } dstStride = _mesa_image_row_stride(packing, width, format, type); dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height, @@ -267,8 +450,6 @@ fast_read_rgba_pixels_memcpy( struct gl_context *ctx, return GL_TRUE; /* don't bother trying the slow path */ } - texelBytes = _mesa_get_format_bytes(rb->Format); - if (swizzle_rb) { /* swap R/B */ for (j = 0; j < height; j++) { @@ -294,13 +475,6 @@ fast_read_rgba_pixels_memcpy( struct gl_context *ctx, dst += dstStride; map += stride; } - } else { - /* just memcpy */ - for (j = 0; j < height; j++) { - memcpy(dst, map, width * texelBytes); - dst += dstStride; - map += stride; - } } ctx->Driver.UnmapRenderbuffer(ctx, rb); @@ -379,22 +553,20 @@ read_rgba_pixels( struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels, const struct gl_pixelstore_attrib *packing ) { - GLbitfield transferOps = ctx->_ImageTransferState; + GLbitfield transferOps; struct gl_framebuffer *fb = ctx->ReadBuffer; struct gl_renderbuffer *rb = fb->_ColorReadBuffer; if (!rb) return; - if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) && - !_mesa_is_enum_format_integer(format)) { - transferOps |= IMAGE_CLAMP_BIT; - } + transferOps = get_readpixels_transfer_ops(ctx, rb->Format, format, type, + GL_FALSE); /* Try the optimized paths first. */ - if (fast_read_rgba_pixels_memcpy(ctx, x, y, width, height, - format, type, pixels, packing, - transferOps)) { + if (!transferOps && + read_rgba_pixels_swizzle(ctx, x, y, width, height, + format, type, pixels, packing)) { return; } @@ -649,6 +821,14 @@ _mesa_readpixels(struct gl_context *ctx, pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels); if (pixels) { + /* Try memcpy first. */ + if (readpixels_memcpy(ctx, x, y, width, height, format, type, + pixels, packing)) { + _mesa_unmap_pbo_dest(ctx, &clippedPacking); + return; + } + + /* Otherwise take the slow path. */ switch (format) { case GL_STENCIL_INDEX: read_stencil_pixels(ctx, x, y, width, height, type, pixels, -- cgit v1.2.3