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Merge "Optimised hwui rounded corners shader"

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Treehugger Robot
2017-06-01 23:13:24 +00:00
committed by Gerrit Code Review
parent 142a392b75 06e9f324ef
commit d7287c96eb
2 changed files with 28 additions and 17 deletions
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29
libs/hwui/ProgramCache.cpp
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@@ -58,7 +58,9 @@ const char* gVS_Header_Uniforms_HasBitmap =
"uniform mat4 textureTransform;\n"
"uniform mediump vec2 textureDimension;\n";
const char* gVS_Header_Uniforms_HasRoundRectClip =
"uniform mat4 roundRectInvTransform;\n";
"uniform mat4 roundRectInvTransform;\n"
"uniform mediump vec4 roundRectInnerRectLTWH;\n"
"uniform mediump float roundRectRadius;\n";
const char* gVS_Header_Varyings_HasTexture =
"varying vec2 outTexCoords;\n";
const char* gVS_Header_Varyings_HasColors =
@@ -87,7 +89,7 @@ const char* gVS_Header_Varyings_HasGradient[6] = {
"varying vec2 ditherTexCoords;\n",
};
const char* gVS_Header_Varyings_HasRoundRectClip =
"varying highp vec2 roundRectPos;\n";
"varying mediump vec2 roundRectPos;\n";
const char* gVS_Main =
"\nvoid main(void) {\n";
const char* gVS_Main_OutTexCoords =
@@ -125,7 +127,7 @@ const char* gVS_Main_VertexAlpha =
" alpha = vtxAlpha;\n";
const char* gVS_Main_HasRoundRectClip =
" roundRectPos = (roundRectInvTransform * transformedPosition).xy;\n";
" roundRectPos = ((roundRectInvTransform * transformedPosition).xy / roundRectRadius) - roundRectInnerRectLTWH.xy;\n";
const char* gVS_Footer =
"}\n\n";
@@ -169,8 +171,8 @@ const char* gFS_Uniforms_ColorOp[3] = {
};
const char* gFS_Uniforms_HasRoundRectClip =
"uniform vec4 roundRectInnerRectLTRB;\n"
"uniform float roundRectRadius;\n";
"uniform mediump vec4 roundRectInnerRectLTWH;\n"
"uniform mediump float roundRectRadius;\n";
const char* gFS_Main =
"\nvoid main(void) {\n"
@@ -315,15 +317,18 @@ const char* gFS_Main_ApplyColorOp[3] = {
" fragColor = blendColors(colorBlend, fragColor);\n"
};
// Note: LTRB -> xyzw
// Note: LTWH (left top width height) -> xyzw
// roundRectPos is now divided by roundRectRadius in vertex shader
// after we also subtract roundRectInnerRectLTWH.xy from roundRectPos
const char* gFS_Main_FragColor_HasRoundRectClip =
" mediump vec2 fragToLT = roundRectInnerRectLTRB.xy - roundRectPos;\n"
" mediump vec2 fragFromRB = roundRectPos - roundRectInnerRectLTRB.zw;\n"
" mediump vec2 fragToLT = -roundRectPos;\n"
" mediump vec2 fragFromRB = roundRectPos - roundRectInnerRectLTWH.zw;\n"
// divide + multiply by 128 to avoid falling out of range in length() function
" mediump vec2 dist = max(max(fragToLT, fragFromRB), vec2(0.0, 0.0)) / 128.0;\n"
" mediump float linearDist = roundRectRadius - (length(dist) * 128.0);\n"
" gl_FragColor *= clamp(linearDist, 0.0, 1.0);\n";
// since distance is divided by radius, it's in [0;1] so precision is not an issue
// this also lets us clamp(0.0, 1.0) instead of max() which is cheaper on GPUs
" mediump vec2 dist = clamp(max(fragToLT, fragFromRB), 0.0, 1.0);\n"
" mediump float linearDist = clamp(roundRectRadius - (length(dist) * roundRectRadius), 0.0, 1.0);\n"
" gl_FragColor *= linearDist;\n";
const char* gFS_Main_DebugHighlight =
" gl_FragColor.rgb = vec3(0.0, gl_FragColor.a, 0.0);\n";

16
libs/hwui/renderstate/RenderState.cpp
View File

@@ -274,14 +274,20 @@ void RenderState::render(const Glop& glop, const Matrix4& orthoMatrix) {
// TODO: avoid query, and cache values (or RRCS ptr) in program
const RoundRectClipState* state = glop.roundRectClipState;
const Rect& innerRect = state->innerRect;
glUniform4f(fill.program->getUniform("roundRectInnerRectLTRB"),
innerRect.left, innerRect.top,
innerRect.right, innerRect.bottom);
glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
1, GL_FALSE, &state->matrix.data[0]);
// add half pixel to round out integer rect space to cover pixel centers
float roundedOutRadius = state->radius + 0.5f;
// Divide by the radius to simplify the calculations in the fragment shader
// roundRectPos is also passed from vertex shader relative to top/left & radius
glUniform4f(fill.program->getUniform("roundRectInnerRectLTWH"),
innerRect.left / roundedOutRadius, innerRect.top / roundedOutRadius,
(innerRect.right - innerRect.left) / roundedOutRadius,
(innerRect.bottom - innerRect.top) / roundedOutRadius);
glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
1, GL_FALSE, &state->matrix.data[0]);
glUniform1f(fill.program->getUniform("roundRectRadius"),
roundedOutRadius);
}