gecko/gfx/layers/opengl/OGLShaderProgram.cpp

551 lines
17 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "OGLShaderProgram.h"
#include <stdint.h> // for uint32_t
#include <sstream> // for ostringstream
#include "gfxRect.h" // for gfxRect
#include "mozilla/DebugOnly.h" // for DebugOnly
#include "nsAString.h"
#include "nsAutoPtr.h" // for nsRefPtr
#include "nsString.h" // for nsAutoCString
#include "prenv.h" // for PR_GetEnv
#include "Layers.h"
#include "GLContext.h"
struct gfxRGBA;
namespace mozilla {
namespace layers {
using namespace std;
#define GAUSSIAN_KERNEL_HALF_WIDTH 11
#define GAUSSIAN_KERNEL_STEP 0.2
void
AddUniforms(ProgramProfileOGL& aProfile)
{
static const char *sKnownUniformNames[] = {
"uLayerTransform",
"uMaskTransform",
"uLayerRects",
"uMatrixProj",
"uTextureTransform",
"uTextureRects",
"uRenderTargetOffset",
"uLayerOpacity",
"uTexture",
"uYTexture",
"uCbTexture",
"uCrTexture",
"uBlackTexture",
"uWhiteTexture",
"uMaskTexture",
"uRenderColor",
"uTexCoordMultiplier",
"uTexturePass2",
nullptr
};
for (int i = 0; sKnownUniformNames[i] != nullptr; ++i) {
aProfile.mUniforms[i].mNameString = sKnownUniformNames[i];
aProfile.mUniforms[i].mName = (KnownUniform::KnownUniformName) i;
}
}
void
ShaderConfigOGL::SetRenderColor(bool aEnabled)
{
SetFeature(ENABLE_RENDER_COLOR, aEnabled);
}
void
ShaderConfigOGL::SetTextureTarget(GLenum aTarget)
{
SetFeature(ENABLE_TEXTURE_EXTERNAL | ENABLE_TEXTURE_RECT, false);
switch (aTarget) {
case LOCAL_GL_TEXTURE_EXTERNAL:
SetFeature(ENABLE_TEXTURE_EXTERNAL, true);
break;
case LOCAL_GL_TEXTURE_RECTANGLE_ARB:
SetFeature(ENABLE_TEXTURE_RECT, true);
break;
}
}
void
ShaderConfigOGL::SetRBSwap(bool aEnabled)
{
SetFeature(ENABLE_TEXTURE_RB_SWAP, aEnabled);
}
void
ShaderConfigOGL::SetNoAlpha(bool aEnabled)
{
SetFeature(ENABLE_TEXTURE_NO_ALPHA, aEnabled);
}
void
ShaderConfigOGL::SetOpacity(bool aEnabled)
{
SetFeature(ENABLE_OPACITY, aEnabled);
}
void
ShaderConfigOGL::SetYCbCr(bool aEnabled)
{
SetFeature(ENABLE_TEXTURE_YCBCR, aEnabled);
}
void
ShaderConfigOGL::SetComponentAlpha(bool aEnabled)
{
SetFeature(ENABLE_TEXTURE_COMPONENT_ALPHA, aEnabled);
}
void
ShaderConfigOGL::SetColorMatrix(bool aEnabled)
{
SetFeature(ENABLE_COLOR_MATRIX, aEnabled);
}
void
ShaderConfigOGL::SetBlur(bool aEnabled)
{
SetFeature(ENABLE_BLUR, aEnabled);
}
void
ShaderConfigOGL::SetMask2D(bool aEnabled)
{
SetFeature(ENABLE_MASK_2D, aEnabled);
}
void
ShaderConfigOGL::SetMask3D(bool aEnabled)
{
SetFeature(ENABLE_MASK_3D, aEnabled);
}
void
ShaderConfigOGL::SetPremultiply(bool aEnabled)
{
SetFeature(ENABLE_PREMULTIPLY, aEnabled);
}
/* static */ ProgramProfileOGL
ProgramProfileOGL::GetProfileFor(ShaderConfigOGL aConfig)
{
ProgramProfileOGL result;
ostringstream fs, vs;
AddUniforms(result);
vs << "uniform mat4 uMatrixProj;" << endl;
vs << "uniform vec4 uLayerRects[4];" << endl;
vs << "uniform mat4 uLayerTransform;" << endl;
vs << "uniform vec4 uRenderTargetOffset;" << endl;
vs << "attribute vec4 aCoord;" << endl;
if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
vs << "uniform mat4 uTextureTransform;" << endl;
vs << "uniform vec4 uTextureRects[4];" << endl;
vs << "varying vec2 vTexCoord;" << endl;
}
if (aConfig.mFeatures & ENABLE_MASK_2D ||
aConfig.mFeatures & ENABLE_MASK_3D) {
vs << "uniform mat4 uMaskTransform;" << endl;
vs << "varying vec3 vMaskCoord;" << endl;
}
vs << "void main() {" << endl;
vs << " int vertexID = int(aCoord.w);" << endl;
vs << " vec4 layerRect = uLayerRects[vertexID];" << endl;
vs << " vec4 finalPosition = vec4(aCoord.xy * layerRect.zw + layerRect.xy, 0.0, 1.0);" << endl;
vs << " finalPosition = uLayerTransform * finalPosition;" << endl;
vs << " finalPosition.xyz /= finalPosition.w;" << endl;
if (aConfig.mFeatures & ENABLE_MASK_3D) {
vs << " vMaskCoord.xy = (uMaskTransform * vec4(finalPosition.xyz, 1.0)).xy;" << endl;
// correct for perspective correct interpolation, see comment in D3D10 shader
vs << " vMaskCoord.z = 1.0;" << endl;
vs << " vMaskCoord *= finalPosition.w;" << endl;
} else if (aConfig.mFeatures & ENABLE_MASK_2D) {
vs << " vMaskCoord.xy = (uMaskTransform * finalPosition).xy;" << endl;
}
vs << " finalPosition = finalPosition - uRenderTargetOffset;" << endl;
vs << " finalPosition.xyz *= finalPosition.w;" << endl;
vs << " finalPosition = uMatrixProj * finalPosition;" << endl;
if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
vs << " vec4 textureRect = uTextureRects[vertexID];" << endl;
vs << " vec2 texCoord = aCoord.xy * textureRect.zw + textureRect.xy;" << endl;
vs << " vTexCoord = (uTextureTransform * vec4(texCoord, 0.0, 1.0)).xy;" << endl;
}
vs << " gl_Position = finalPosition;" << endl;
vs << "}" << endl;
if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) {
fs << "#extension GL_ARB_texture_rectangle : require" << endl;
}
if (aConfig.mFeatures & ENABLE_TEXTURE_EXTERNAL) {
fs << "#extension GL_OES_EGL_image_external : require" << endl;
}
fs << "#ifdef GL_ES" << endl;
fs << "precision mediump float;" << endl;
fs << "#define COLOR_PRECISION lowp" << endl;
fs << "#else" << endl;
fs << "#define COLOR_PRECISION" << endl;
fs << "#endif" << endl;
if (aConfig.mFeatures & ENABLE_RENDER_COLOR) {
fs << "uniform COLOR_PRECISION vec4 uRenderColor;" << endl;
} else {
// for tiling, texcoord can be greater than the lowfp range
fs << "varying vec2 vTexCoord;" << endl;
if (aConfig.mFeatures & ENABLE_BLUR) {
fs << "uniform bool uBlurAlpha;" << endl;
fs << "uniform vec2 uBlurRadius;" << endl;
fs << "uniform vec2 uBlurOffset;" << endl;
fs << "uniform float uBlurGaussianKernel[" << GAUSSIAN_KERNEL_HALF_WIDTH << "];" << endl;
}
if (aConfig.mFeatures & ENABLE_COLOR_MATRIX) {
fs << "uniform mat4 uColorMatrix;" << endl;
fs << "uniform vec4 uColorMatrixVector;" << endl;
}
if (aConfig.mFeatures & ENABLE_OPACITY) {
fs << "uniform COLOR_PRECISION float uLayerOpacity;" << endl;
}
}
const char *sampler2D = "sampler2D";
const char *texture2D = "texture2D";
if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) {
fs << "uniform vec2 uTexCoordMultiplier;" << endl;
sampler2D = "sampler2DRect";
texture2D = "texture2DRect";
}
if (aConfig.mFeatures & ENABLE_TEXTURE_EXTERNAL) {
sampler2D = "samplerExternalOES";
}
if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) {
fs << "uniform sampler2D uYTexture;" << endl;
fs << "uniform sampler2D uCbTexture;" << endl;
fs << "uniform sampler2D uCrTexture;" << endl;
} else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) {
fs << "uniform sampler2D uBlackTexture;" << endl;
fs << "uniform sampler2D uWhiteTexture;" << endl;
fs << "uniform bool uTexturePass2;" << endl;
} else {
fs << "uniform " << sampler2D << " uTexture;" << endl;
}
if (aConfig.mFeatures & ENABLE_MASK_2D ||
aConfig.mFeatures & ENABLE_MASK_3D) {
fs << "varying vec3 vMaskCoord;" << endl;
fs << "uniform sampler2D uMaskTexture;" << endl;
}
if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
fs << "vec4 sample(vec2 coord) {" << endl;
fs << " vec4 color;" << endl;
if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) {
fs << " COLOR_PRECISION float y = texture2D(uYTexture, coord).r;" << endl;
fs << " COLOR_PRECISION float cb = texture2D(uCbTexture, coord).r;" << endl;
fs << " COLOR_PRECISION float cr = texture2D(uCrTexture, coord).r;" << endl;
/* From Rec601:
[R] [1.1643835616438356, 0.0, 1.5960267857142858] [ Y - 16]
[G] = [1.1643835616438358, -0.3917622900949137, -0.8129676472377708] x [Cb - 128]
[B] [1.1643835616438356, 2.017232142857143, 8.862867620416422e-17] [Cr - 128]
For [0,1] instead of [0,255], and to 5 places:
[R] [1.16438, 0.00000, 1.59603] [ Y - 0.06275]
[G] = [1.16438, -0.39176, -0.81297] x [Cb - 0.50196]
[B] [1.16438, 2.01723, 0.00000] [Cr - 0.50196]
*/
fs << " y = (y - 0.06275) * 1.16438;" << endl;
fs << " cb = cb - 0.50196;" << endl;
fs << " cr = cr - 0.50196;" << endl;
fs << " color.r = y + 1.59603*cr;" << endl;
fs << " color.g = y - 0.39176*cb - 0.81297*cr;" << endl;
fs << " color.b = y + 2.01723*cb;" << endl;
fs << " color.a = 1.0;" << endl;
} else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) {
fs << " COLOR_PRECISION vec3 onBlack = texture2D(uBlackTexture, coord).rgb;" << endl;
fs << " COLOR_PRECISION vec3 onWhite = texture2D(uWhiteTexture, coord).rgb;" << endl;
fs << " COLOR_PRECISION vec4 alphas = (1.0 - onWhite + onBlack).rgbg;" << endl;
fs << " if (uTexturePass2)" << endl;
fs << " color = vec4(onBlack, alphas.a);" << endl;
fs << " else" << endl;
fs << " color = alphas;" << endl;
} else {
fs << " color = " << texture2D << "(uTexture, coord);" << endl;
}
if (aConfig.mFeatures & ENABLE_TEXTURE_RB_SWAP) {
fs << " color = color.bgra;" << endl;
}
if (aConfig.mFeatures & ENABLE_TEXTURE_NO_ALPHA) {
fs << " color = vec4(color.rgb, 1.0);" << endl;
}
fs << " return color;" << endl;
fs << "}" << endl;
if (aConfig.mFeatures & ENABLE_BLUR) {
fs << "vec4 sampleAtRadius(vec2 coord, float radius) {" << endl;
fs << " coord += uBlurOffset;" << endl;
fs << " coord += radius * uBlurRadius;" << endl;
fs << " if (coord.x < 0. || coord.y < 0. || coord.x > 1. || coord.y > 1.)" << endl;
fs << " return vec4(0, 0, 0, 0);" << endl;
fs << " return sample(coord);" << endl;
fs << "}" << endl;
fs << "vec4 blur(vec4 color, vec2 coord) {" << endl;
fs << " vec4 total = color * uBlurGaussianKernel[0];" << endl;
fs << " for (int i = 1; i < " << GAUSSIAN_KERNEL_HALF_WIDTH << "; ++i) {" << endl;
fs << " float r = float(i) * " << GAUSSIAN_KERNEL_STEP << " << endl;" << endl;
fs << " float k = uBlurGaussianKernel[i];" << endl;
fs << " total += sampleAtRadius(coord, r) * k;" << endl;
fs << " total += sampleAtRadius(coord, -r) * k;" << endl;
fs << " }" << endl;
fs << " if (uBlurAlpha) {" << endl;
fs << " color *= total.a;" << endl;
fs << " } else {" << endl;
fs << " color = total;" << endl;
fs << " }" << endl;
fs << " return color;" << endl;
fs << "}" << endl;
}
}
fs << "void main() {" << endl;
if (aConfig.mFeatures & ENABLE_RENDER_COLOR) {
fs << " vec4 color = uRenderColor;" << endl;
} else {
if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) {
fs << " vec4 color = sample(vTexCoord * uTexCoordMultiplier);" << endl;
} else {
fs << " vec4 color = sample(vTexCoord);" << endl;
}
if (aConfig.mFeatures & ENABLE_BLUR) {
fs << " color = blur(color, vTexCoord);" << endl;
}
if (aConfig.mFeatures & ENABLE_COLOR_MATRIX) {
fs << " color = uColorMatrix * vec4(color.rgb / color.a, color.a) + uColorMatrixVector;" << endl;
fs << " color.rgb *= color.a;" << endl;
}
if (aConfig.mFeatures & ENABLE_OPACITY) {
fs << " color *= uLayerOpacity;" << endl;
}
if (aConfig.mFeatures & ENABLE_PREMULTIPLY) {
fs << " color.rgb *= color.a;" << endl;
}
}
if (aConfig.mFeatures & ENABLE_MASK_3D) {
fs << " vec2 maskCoords = vMaskCoord.xy / vMaskCoord.z;" << endl;
fs << " COLOR_PRECISION float mask = texture2D(uMaskTexture, maskCoords).r;" << endl;
fs << " color *= mask;" << endl;
} else if (aConfig.mFeatures & ENABLE_MASK_2D) {
fs << " COLOR_PRECISION float mask = texture2D(uMaskTexture, vMaskCoord.xy).r;" << endl;
fs << " color *= mask;" << endl;
} else {
fs << " COLOR_PRECISION float mask = 1.0;" << endl;
fs << " color *= mask;" << endl;
}
fs << " gl_FragColor = color;" << endl;
fs << "}" << endl;
result.mVertexShaderString = vs.str();
result.mFragmentShaderString = fs.str();
if (aConfig.mFeatures & ENABLE_RENDER_COLOR) {
result.mTextureCount = 0;
} else {
if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) {
result.mTextureCount = 3;
} else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) {
result.mTextureCount = 2;
} else {
result.mTextureCount = 1;
}
}
if (aConfig.mFeatures & ENABLE_MASK_2D ||
aConfig.mFeatures & ENABLE_MASK_3D) {
result.mTextureCount = 1;
}
return result;
}
ShaderProgramOGL::ShaderProgramOGL(GLContext* aGL, const ProgramProfileOGL& aProfile)
: mGL(aGL)
, mProgram(0)
, mProfile(aProfile)
, mProgramState(STATE_NEW)
{
}
ShaderProgramOGL::~ShaderProgramOGL()
{
if (mProgram <= 0) {
return;
}
nsRefPtr<GLContext> ctx = mGL->GetSharedContext();
if (!ctx) {
ctx = mGL;
}
ctx->MakeCurrent();
ctx->fDeleteProgram(mProgram);
}
bool
ShaderProgramOGL::Initialize()
{
NS_ASSERTION(mProgramState == STATE_NEW, "Shader program has already been initialised");
ostringstream vs, fs;
for (uint32_t i = 0; i < mProfile.mDefines.Length(); ++i) {
vs << mProfile.mDefines[i] << endl;
fs << mProfile.mDefines[i] << endl;
}
vs << mProfile.mVertexShaderString << endl;
fs << mProfile.mFragmentShaderString << endl;
if (!CreateProgram(vs.str().c_str(), fs.str().c_str())) {
mProgramState = STATE_ERROR;
return false;
}
mProgramState = STATE_OK;
for (uint32_t i = 0; i < KnownUniform::KnownUniformCount; ++i) {
mProfile.mUniforms[i].mLocation =
mGL->fGetUniformLocation(mProgram, mProfile.mUniforms[i].mNameString);
}
return true;
}
GLint
ShaderProgramOGL::CreateShader(GLenum aShaderType, const char *aShaderSource)
{
GLint success, len = 0;
GLint sh = mGL->fCreateShader(aShaderType);
mGL->fShaderSource(sh, 1, (const GLchar**)&aShaderSource, nullptr);
mGL->fCompileShader(sh);
mGL->fGetShaderiv(sh, LOCAL_GL_COMPILE_STATUS, &success);
mGL->fGetShaderiv(sh, LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len);
/* Even if compiling is successful, there may still be warnings. Print them
* in a debug build. The > 10 is to catch silly compilers that might put
* some whitespace in the log but otherwise leave it empty.
*/
if (!success
#ifdef DEBUG
|| (len > 10 && PR_GetEnv("MOZ_DEBUG_SHADERS"))
#endif
)
{
nsAutoCString log;
log.SetCapacity(len);
mGL->fGetShaderInfoLog(sh, len, (GLint*) &len, (char*) log.BeginWriting());
log.SetLength(len);
if (!success) {
printf_stderr("=== SHADER COMPILATION FAILED ===\n");
} else {
printf_stderr("=== SHADER COMPILATION WARNINGS ===\n");
}
printf_stderr("=== Source:\n%s\n", aShaderSource);
printf_stderr("=== Log:\n%s\n", log.get());
printf_stderr("============\n");
if (!success) {
mGL->fDeleteShader(sh);
return 0;
}
}
return sh;
}
bool
ShaderProgramOGL::CreateProgram(const char *aVertexShaderString,
const char *aFragmentShaderString)
{
GLuint vertexShader = CreateShader(LOCAL_GL_VERTEX_SHADER, aVertexShaderString);
GLuint fragmentShader = CreateShader(LOCAL_GL_FRAGMENT_SHADER, aFragmentShaderString);
if (!vertexShader || !fragmentShader)
return false;
GLint result = mGL->fCreateProgram();
mGL->fAttachShader(result, vertexShader);
mGL->fAttachShader(result, fragmentShader);
mGL->fLinkProgram(result);
GLint success, len;
mGL->fGetProgramiv(result, LOCAL_GL_LINK_STATUS, &success);
mGL->fGetProgramiv(result, LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len);
/* Even if linking is successful, there may still be warnings. Print them
* in a debug build. The > 10 is to catch silly compilers that might put
* some whitespace in the log but otherwise leave it empty.
*/
if (!success
#ifdef DEBUG
|| (len > 10 && PR_GetEnv("MOZ_DEBUG_SHADERS"))
#endif
)
{
nsAutoCString log;
log.SetCapacity(len);
mGL->fGetProgramInfoLog(result, len, (GLint*) &len, (char*) log.BeginWriting());
log.SetLength(len);
if (!success) {
printf_stderr("=== PROGRAM LINKING FAILED ===\n");
} else {
printf_stderr("=== PROGRAM LINKING WARNINGS ===\n");
}
printf_stderr("=== Log:\n%s\n", log.get());
printf_stderr("============\n");
}
// We can mark the shaders for deletion; they're attached to the program
// and will remain attached.
mGL->fDeleteShader(vertexShader);
mGL->fDeleteShader(fragmentShader);
if (!success) {
mGL->fDeleteProgram(result);
return false;
}
mProgram = result;
return true;
}
void
ShaderProgramOGL::Activate()
{
if (mProgramState == STATE_NEW) {
if (!Initialize()) {
NS_WARNING("Shader could not be initialised");
return;
}
}
NS_ASSERTION(HasInitialized(), "Attempting to activate a program that's not in use!");
mGL->fUseProgram(mProgram);
}
} /* layers */
} /* mozilla */