diff options
Diffstat (limited to 'src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp')
| -rw-r--r-- | src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp b/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp index f17e741169..f0b645ee42 100644 --- a/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp +++ b/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp @@ -47,13 +47,15 @@ void GrGLVertexBuilder::transformToNormalizedDeviceSpace(const GrShaderVar& posV // Transform from Skia's device coords to GL's normalized device coords. Note that // because we want to "nudge" the device space positions we are converting to // non-homogeneous NDC. + // The "0.05" nudge serves to match the raster path's rounding for bw draws. + // For aa draws we just assume the impact will be minimal - so we always perform the nudge. if (kVec3f_GrSLType == posVar.getType()) { - this->codeAppendf("gl_Position = vec4(dot(%s.xz, %s.xy)/%s.z, dot(%s.yz, %s.zw)/%s.z, 0, 1);", - posVar.c_str(), fRtAdjustName, posVar.c_str(), - posVar.c_str(), fRtAdjustName, posVar.c_str()); + this->codeAppendf("gl_Position = vec4((dot(%s.xz, %s.xy)/%s.z) + 0.05 * %s.x, (dot(%s.yz, %s.zw)/%s.z) + 0.05 * %s.z, 0, 1);", + posVar.c_str(), fRtAdjustName, posVar.c_str(), fRtAdjustName, + posVar.c_str(), fRtAdjustName, posVar.c_str(), fRtAdjustName); } else { SkASSERT(kVec2f_GrSLType == posVar.getType()); - this->codeAppendf("gl_Position = vec4(%s.x * %s.x + %s.y, %s.y * %s.z + %s.w, 0, 1);", + this->codeAppendf("gl_Position = vec4((%s.x + 0.05) * %s.x + %s.y, (%s.y + 0.05) * %s.z + %s.w, 0, 1);", posVar.c_str(), fRtAdjustName, fRtAdjustName, posVar.c_str(), fRtAdjustName, fRtAdjustName); } |