diff options
Diffstat (limited to 'chromium/ui/surface/accelerated_surface_transformer_win.hlsl')
| -rw-r--r-- | chromium/ui/surface/accelerated_surface_transformer_win.hlsl | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/chromium/ui/surface/accelerated_surface_transformer_win.hlsl b/chromium/ui/surface/accelerated_surface_transformer_win.hlsl deleted file mode 100644 index aa105ceccea..00000000000 --- a/chromium/ui/surface/accelerated_surface_transformer_win.hlsl +++ /dev/null @@ -1,300 +0,0 @@ -// Copyright (c) 2012 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -// @gyp_namespace(ui_surface) -// Compiles into C++ as 'accelerated_surface_transformer_win_hlsl_compiled.h' - -struct Vertex { - float4 position : POSITION; - float2 texCoord : TEXCOORD0; -}; - -texture t; -sampler s; - -extern uniform float2 kRenderTargetSize : c0; -extern uniform float2 kTextureScale : c1; - -// @gyp_compile(vs_2_0, vsOneTexture) -// -// Passes a position and texture coordinate to the pixel shader. -Vertex vsOneTexture(Vertex input) { - // Texture scale is typically just 1 (to do nothing) or -1 (to flip). - input.texCoord = ((2 * (input.texCoord - 0.5) * kTextureScale) + 1) / 2; - input.position.x += -1 / kRenderTargetSize.x; - input.position.y += 1 / kRenderTargetSize.y; - return input; -}; - -// @gyp_compile(ps_2_0, psOneTexture) -// -// Samples a texture at the given texture coordinate and returns the result. -float4 psOneTexture(float2 texCoord : TEXCOORD0) : COLOR0 { - return tex2D(s, texCoord); -}; - -// Return |value| rounded up to the nearest multiple of |multiple|. -float alignTo(float value, float multiple) { - // |multiple| is usually a compile-time constant; this check allows - // the compiler to avoid the fmod when possible. - if (multiple == 1) - return value; - - // Biasing the value provides numeric stability. We expect |value| to - // be an integer; this prevents 4.001 from being rounded up to 8. - float biased_value = value - 0.5; - return biased_value + multiple - fmod(biased_value, multiple); -} - -float4 packForByteOrder(float4 value) { - return value.bgra; -} - -// Adjust the input vertex to address the correct range of texels. This depends -// on the value of the shader constant |kRenderTargetSize|, as well as an -// alignment factor |align| that effectively specifies the footprint of the -// texel samples done by this shader pass, and is used to correct when that -// footprint size doesn't align perfectly with the actual input size. -Vertex adjustForAlignmentAndPacking(Vertex vtx, float2 align) { - float src_width = kRenderTargetSize.x; - float src_height = kRenderTargetSize.y; - - // Because our caller expects to be sampling |align.x| many pixels from src at - // a time, if src's width isn't evenly divisible by |align.x|, it is necessary - // to pretend that the source is slightly bigger than it is. - float bloated_src_width = alignTo(src_width, align.x); - float bloated_src_height = alignTo(src_height, align.y); - - // When bloated_src_width != src_width, we'll adjust the texture coordinates - // to sample past the edge of the vtx; clamping will produce extra copies of - // the last row. - float texture_x_scale = bloated_src_width / src_width; - float texture_y_scale = bloated_src_height / src_height; - - // Adjust positions so that we're addressing full fragments in the output, per - // the top-left filling convention. The shifts would be equivalent to - // 1/dst_width and 1/dst_height, if we were to calculate those explicitly. - vtx.position.x -= align.x / bloated_src_width; - vtx.position.y += align.y / bloated_src_height; - - // Apply the texture scale - vtx.texCoord.x *= texture_x_scale; - vtx.texCoord.y *= texture_y_scale; - - return vtx; -} - -/////////////////////////////////////////////////////////////////////// -// RGB24 to YV12 in two passes; writing two 8888 targets each pass. -// -// YV12 is full-resolution luma and half-resolution blue/red chroma. -// -// (original) -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// XRGB XRGB XRGB XRGB XRGB XRGB XRGB XRGB -// | -// | (y plane) (temporary) -// | YYYY YYYY UVUV UVUV -// +--> { YYYY YYYY + UVUV UVUV } -// YYYY YYYY UVUV UVUV -// First YYYY YYYY UVUV UVUV -// pass YYYY YYYY UVUV UVUV -// YYYY YYYY UVUV UVUV -// | -// | (u plane) (v plane) -// Second | UUUU VVVV -// pass +--> { UUUU + VVVV } -// UUUU VVVV -// -/////////////////////////////////////////////////////////////////////// - -// Phase one of RGB24->YV12 conversion: vsFetch4Pixels/psConvertRGBtoY8UV44 -// -// @gyp_compile(vs_2_0, vsFetch4Pixels) -// @gyp_compile(ps_2_0, psConvertRGBtoY8UV44) -// -// Writes four source pixels at a time to a full-size Y plane and a half-width -// interleaved UV plane. After execution, the Y plane is complete but the UV -// planes still need to be de-interleaved and vertically scaled. -// -void vsFetch4Pixels(in Vertex vertex, - out float4 position : POSITION, - out float2 texCoord0 : TEXCOORD0, - out float2 texCoord1 : TEXCOORD1, - out float2 texCoord2 : TEXCOORD2, - out float2 texCoord3 : TEXCOORD3) { - Vertex adjusted = adjustForAlignmentAndPacking(vertex, float2(4, 1)); - - // Set up four taps, aligned to texel centers if the src's true size is - // |kRenderTargetSize|, and doing bilinear interpolation otherwise. - float2 one_texel_x = float2(1 / kRenderTargetSize.x, 0); - position = adjusted.position; - texCoord0 = adjusted.texCoord - 1.5f * one_texel_x; - texCoord1 = adjusted.texCoord - 0.5f * one_texel_x; - texCoord2 = adjusted.texCoord + 0.5f * one_texel_x; - texCoord3 = adjusted.texCoord + 1.5f * one_texel_x; -}; - -struct YV16QuadPixel -{ - float4 YYYY : COLOR0; - float4 UUVV : COLOR1; -}; - -// Color conversion constants. -static const float3x1 rgb_to_y = float3x1( +0.257f, +0.504f, +0.098f ); -static const float3x1 rgb_to_u = float3x1( -0.148f, -0.291f, +0.439f ); -static const float3x1 rgb_to_v = float3x1( +0.439f, -0.368f, -0.071f ); -static const float y_bias = 0.0625f; -static const float uv_bias = 0.5f; - -YV16QuadPixel psConvertRGBtoY8UV44(float2 texCoord0 : TEXCOORD0, - float2 texCoord1 : TEXCOORD1, - float2 texCoord2 : TEXCOORD2, - float2 texCoord3 : TEXCOORD3) { - // Load the four texture samples into a matrix. - float4x3 rgb_quad_pixel = float4x3(tex2D(s, texCoord0).rgb, - tex2D(s, texCoord1).rgb, - tex2D(s, texCoord2).rgb, - tex2D(s, texCoord3).rgb); - - // RGB -> Y conversion (x4). - float4 yyyy = mul(rgb_quad_pixel, rgb_to_y) + y_bias; - - // Average adjacent texture samples while converting RGB->UV. This is the same - // as color converting then averaging, but slightly less math. These values - // will be in the range [-0.439f, +0.439f] and still need to have the bias - // term applied. - float2x3 rgb_double_pixel = float2x3(rgb_quad_pixel[0] + rgb_quad_pixel[1], - rgb_quad_pixel[2] + rgb_quad_pixel[3]); - float2 uu = mul(rgb_double_pixel, rgb_to_u / 2); - float2 vv = mul(rgb_double_pixel, rgb_to_v / 2); - - // Package the result to account for BGRA byte ordering. - YV16QuadPixel result; - result.YYYY = packForByteOrder(yyyy); - result.UUVV.xyzw = float4(uu, vv) + uv_bias; // Apply uv bias. - return result; -}; - -// Phase two of RGB24->YV12 conversion: vsFetch2Pixels/psConvertUV44toU2V2 -// -// @gyp_compile(vs_2_0, vsFetch2Pixels) -// @gyp_compile(ps_2_0, psConvertUV44toU2V2) -// -// Deals with UV only. Input is interleaved UV pixels, already scaled -// horizontally, packed two per RGBA texel. Output is two color planes U and V, -// packed four to a RGBA pixel. -// -// Vertical scaling happens via a half-texel offset and bilinear interpolation -// during texture sampling. -void vsFetch2Pixels(in Vertex vertex, - out float4 position : POSITION, - out float2 texCoord0 : TEXCOORD0, - out float2 texCoord1 : TEXCOORD1) { - // We fetch two texels in the horizontal direction, and scale by 2 in the - // vertical direction. - Vertex adjusted = adjustForAlignmentAndPacking(vertex, float2(2, 2)); - - // Setup the two texture coordinates. No need to adjust texCoord.y; it's - // already at the mid-way point between the two rows. Horizontally, we'll - // fetch two texels so that we have enough data to fill our output. - float2 one_texel_x = float2(1 / kRenderTargetSize.x, 0); - position = adjusted.position; - texCoord0 = adjusted.texCoord - 0.5f * one_texel_x; - texCoord1 = adjusted.texCoord + 0.5f * one_texel_x; -}; - -struct UV8QuadPixel { - float4 UUUU : COLOR0; - float4 VVVV : COLOR1; -}; - -UV8QuadPixel psConvertUV44toU2V2(float2 texCoord0 : TEXCOORD0, - float2 texCoord1 : TEXCOORD1) { - // We're just sampling two pixels and unswizzling them. There's no need to do - // vertical scaling with math, since bilinear interpolation in the sampler - // takes care of that. - float4 lo_uuvv = tex2D(s, texCoord0); - float4 hi_uuvv = tex2D(s, texCoord1); - UV8QuadPixel result; - result.UUUU = packForByteOrder(float4(lo_uuvv.xy, hi_uuvv.xy)); - result.VVVV = packForByteOrder(float4(lo_uuvv.zw, hi_uuvv.zw)); - return result; -}; - - -/////////////////////////////////////////////////////////////////////// -// RGB24 to YV12 in three passes, without MRT: one pass per output color plane. -// vsFetch4Pixels is the common vertex shader for all three passes. -// -// Note that this technique will not do full bilinear filtering on its RGB -// input (you'd get correctly filtered Y, but aliasing in U and V). -// -// Pass 1: vsFetch4Pixels + psConvertRGBToY -// Pass 2: vsFetch4Pixels_Scale2 + psConvertRGBToU -// Pass 3: vsFetch4Pixels_Scale2 + psConvertRGBToV -// -// @gyp_compile(vs_2_0, vsFetch4Pixels_Scale2) -// @gyp_compile(ps_2_0, psConvertRGBtoY) -// @gyp_compile(ps_2_0, psConvertRGBtoU) -// @gyp_compile(ps_2_0, psConvertRGBtoV) -// -/////////////////////////////////////////////////////////////////////// -void vsFetch4Pixels_Scale2(in Vertex vertex, - out float4 position : POSITION, - out float2 texCoord0 : TEXCOORD0, - out float2 texCoord1 : TEXCOORD1, - out float2 texCoord2 : TEXCOORD2, - out float2 texCoord3 : TEXCOORD3) { - Vertex adjusted = adjustForAlignmentAndPacking(vertex, float2(8, 2)); - - // Set up four taps, each of which samples a 2x2 texel quad at the midpoint. - float2 one_texel_x = float2(1 / kRenderTargetSize.x, 0); - position = adjusted.position; - texCoord0 = adjusted.texCoord - 3 * one_texel_x; - texCoord1 = adjusted.texCoord - 1 * one_texel_x; - texCoord2 = adjusted.texCoord + 1 * one_texel_x; - texCoord3 = adjusted.texCoord + 3 * one_texel_x; -}; - -// RGB -> Y, four samples at a time. -float4 psConvertRGBtoY(float2 texCoord0 : TEXCOORD0, - float2 texCoord1 : TEXCOORD1, - float2 texCoord2 : TEXCOORD2, - float2 texCoord3 : TEXCOORD3) : COLOR0 { - float4x3 rgb_quad_pixel = float4x3(tex2D(s, texCoord0).rgb, - tex2D(s, texCoord1).rgb, - tex2D(s, texCoord2).rgb, - tex2D(s, texCoord3).rgb); - return packForByteOrder(mul(rgb_quad_pixel, rgb_to_y) + y_bias); -} - -// RGB -> U, four samples at a time. -float4 psConvertRGBtoU(float2 texCoord0 : TEXCOORD0, - float2 texCoord1 : TEXCOORD1, - float2 texCoord2 : TEXCOORD2, - float2 texCoord3 : TEXCOORD3) : COLOR0 { - float4x3 rgb_quad_pixel = float4x3(tex2D(s, texCoord0).rgb, - tex2D(s, texCoord1).rgb, - tex2D(s, texCoord2).rgb, - tex2D(s, texCoord3).rgb); - return packForByteOrder(mul(rgb_quad_pixel, rgb_to_u) + uv_bias); -} - -// RGB -> V, four samples at a time. -float4 psConvertRGBtoV(float2 texCoord0 : TEXCOORD0, - float2 texCoord1 : TEXCOORD1, - float2 texCoord2 : TEXCOORD2, - float2 texCoord3 : TEXCOORD3) : COLOR0 { - float4x3 rgb_quad_pixel = float4x3(tex2D(s, texCoord0).rgb, - tex2D(s, texCoord1).rgb, - tex2D(s, texCoord2).rgb, - tex2D(s, texCoord3).rgb); - return packForByteOrder(mul(rgb_quad_pixel, rgb_to_v) + uv_bias); -} |