diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qglengineshadersource_p.h')
-rw-r--r-- | src/opengl/gl2paintengineex/qglengineshadersource_p.h | 66 |
1 files changed, 32 insertions, 34 deletions
diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h index 2407979..46de124 100644 --- a/src/opengl/gl2paintengineex/qglengineshadersource_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h @@ -99,12 +99,15 @@ static const char* const qglslMainWithTexCoordsAndOpacityVertexShader = "\ opacity = opacityArray; \ }"; +// NOTE: We let GL do the perspective correction so texture lookups in the fragment +// shader are also perspective corrected. static const char* const qglslPositionOnlyVertexShader = "\ - attribute highp vec4 vertexCoordsArray;\ - uniform highp mat4 pmvMatrix;\ + attribute highp vec2 vertexCoordsArray;\ + uniform highp mat3 pmvMatrix;\ void setPosition(void)\ {\ - gl_Position = pmvMatrix * vertexCoordsArray;\ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position = vec4(transformedPos.xy, 0.0, transformedPos.z); \ }"; static const char* const qglslUntransformedPositionVertexShader = "\ @@ -116,20 +119,19 @@ static const char* const qglslUntransformedPositionVertexShader = "\ // Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125 static const char* const qglslPositionWithPatternBrushVertexShader = "\ - attribute highp vec4 vertexCoordsArray; \ - uniform highp mat4 pmvMatrix; \ + attribute highp vec2 vertexCoordsArray; \ + uniform highp mat3 pmvMatrix; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec2 invertedTextureSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 patternTexCoords; \ void setPosition(void) { \ - gl_Position = pmvMatrix * vertexCoordsArray;\ - gl_Position.xy = gl_Position.xy / gl_Position.w; \ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ - mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \ + mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1.0); \ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \ - gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \ - gl_Position.w = invertedHTexCoordsZ; \ + gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \ patternTexCoords.xy = (hTexCoords.xy * 0.125) * invertedHTexCoordsZ; \ }"; @@ -147,20 +149,19 @@ static const char* const qglslPatternBrushSrcFragmentShader = "\ // Linear Gradient Brush static const char* const qglslPositionWithLinearGradientBrushVertexShader = "\ - attribute highp vec4 vertexCoordsArray; \ - uniform highp mat4 pmvMatrix; \ + attribute highp vec2 vertexCoordsArray; \ + uniform highp mat3 pmvMatrix; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec3 linearData; \ uniform highp mat3 brushTransform; \ varying mediump float index; \ void setPosition() { \ - gl_Position = pmvMatrix * vertexCoordsArray;\ - gl_Position.xy = gl_Position.xy / gl_Position.w; \ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \ - gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \ - gl_Position.w = invertedHTexCoordsZ; \ + gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \ index = (dot(linearData.xy, hTexCoords.xy) * linearData.z) * invertedHTexCoordsZ; \ }"; @@ -178,20 +179,19 @@ static const char* const qglslLinearGradientBrushSrcFragmentShader = "\ // Conical Gradient Brush static const char* const qglslPositionWithConicalGradientBrushVertexShader = "\ - attribute highp vec4 vertexCoordsArray;\ - uniform highp mat4 pmvMatrix;\ + attribute highp vec2 vertexCoordsArray;\ + uniform highp mat3 pmvMatrix;\ uniform mediump vec2 halfViewportSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 A; \ void setPosition(void)\ {\ - gl_Position = pmvMatrix * vertexCoordsArray;\ - gl_Position.xy = gl_Position.xy / gl_Position.w; \ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \ - gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \ - gl_Position.w = invertedHTexCoordsZ; \ + gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \ A = hTexCoords.xy * invertedHTexCoordsZ; \ }"; @@ -215,8 +215,8 @@ static const char* const qglslConicalGradientBrushSrcFragmentShader = "\n\ // Radial Gradient Brush static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\ - attribute highp vec4 vertexCoordsArray;\ - uniform highp mat4 pmvMatrix;\ + attribute highp vec2 vertexCoordsArray;\ + uniform highp mat3 pmvMatrix;\ uniform mediump vec2 halfViewportSize; \ uniform highp mat3 brushTransform; \ uniform highp vec2 fmp; \ @@ -224,13 +224,12 @@ static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\ varying highp vec2 A; \ void setPosition(void) \ {\ - gl_Position = pmvMatrix * vertexCoordsArray;\ - gl_Position.xy = gl_Position.xy / gl_Position.w; \ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \ - gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \ - gl_Position.w = invertedHTexCoordsZ; \ + gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \ A = hTexCoords.xy * invertedHTexCoordsZ; \ b = 2.0 * dot(A, fmp); \ }"; @@ -253,20 +252,19 @@ static const char* const qglslRadialGradientBrushSrcFragmentShader = "\ // Texture Brush static const char* const qglslPositionWithTextureBrushVertexShader = "\ - attribute highp vec4 vertexCoordsArray; \ - uniform highp mat4 pmvMatrix; \ + attribute highp vec2 vertexCoordsArray; \ + uniform highp mat3 pmvMatrix; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec2 invertedTextureSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 textureCoords; \ void setPosition(void) { \ - gl_Position = pmvMatrix * vertexCoordsArray;\ - gl_Position.xy = gl_Position.xy / gl_Position.w; \ + vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ + gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \ - gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \ - gl_Position.w = invertedHTexCoordsZ; \ + gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \ textureCoords.xy = (hTexCoords.xy * invertedTextureSize) * gl_Position.w; \ }"; |