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Upload stencil by bit rather than by value.

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Still not the most optimal way, probably, but this was an easy change.
This commit is contained in:
Unknown W. Brackets 2014-05-31 19:51:03 -07:00
parent 7c87138915
commit 66fff0601d
1 changed files with 19 additions and 13 deletions
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32
GPU/GLES/StencilBuffer.cpp
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@ -32,8 +32,9 @@ static const char *stencil_fs =
"float roundAndScaleTo255f(in float x) { return floor(x * 255.99); }\n"
"void main() {\n"
" vec4 index = texture2D(tex, v_texcoord0);\n"
" gl_FragColor = vec4(u_stencilValue);\n"
" if (roundAndScaleTo255f(u_stencilValue) != roundAndScaleTo255f(index.a)) discard;\n"
" gl_FragColor = vec4(1.0);\n"
" float shifted = roundAndScaleTo255f(index.a) / roundAndScaleTo255f(u_stencilValue);\n"
" if (mod(floor(shifted), 2.0) < 0.99) discard;\n"
"}\n";
static const char *stencil_vs =
@ -96,20 +97,20 @@ bool FramebufferManager::NotifyStencilUpload(u32 addr, int size) {
glstate.stencilOp.set(GL_REPLACE, GL_REPLACE, GL_REPLACE);
// TODO: Doing it the slow way for now.
int passes = 0;
int values = 0;
switch (dstBuffer->format) {
case GE_FORMAT_565:
// Well, this doesn't make much sense.
return false;
case GE_FORMAT_5551:
passes = 2;
values = 2;
break;
case GE_FORMAT_4444:
passes = 16;
values = 16;
break;
case GE_FORMAT_8888:
passes = 256;
values = 256;
break;
}
@ -121,20 +122,25 @@ bool FramebufferManager::NotifyStencilUpload(u32 addr, int size) {
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
const float scale = 1.0f / (passes - 1);
glstate.stencilFunc.set(GL_ALWAYS, 0xFF, 0xFF);
GLint u_stencilValue = glsl_uniform_loc(stencilUploadProgram_, "u_stencilValue");
for (int i = 0; i < passes; ++i) {
for (int i = 1; i < values; i += i) {
// DrawActiveTexture unbinds it, so rebind here before setting uniforms.
glsl_bind(stencilUploadProgram_);
glUniform1f(u_stencilValue, i * scale);
if (dstBuffer->format == GE_FORMAT_4444) {
glstate.stencilFunc.set(GL_ALWAYS, Convert4To8(i), 0xFF);
glStencilMask(Convert4To8(i));
glUniform1f(u_stencilValue, i * (16.0f / 255.0f));
} else if (dstBuffer->format == GE_FORMAT_5551) {
glstate.stencilFunc.set(GL_ALWAYS, i ? 0xFF : 0x00, 0xFF);
} else if (dstBuffer->format == GE_FORMAT_8888) {
glstate.stencilFunc.set(GL_ALWAYS, i, 0xFF);
glStencilMask(0xFF);
glUniform1f(u_stencilValue, i * (128.0f / 255.0f));
} else {
glStencilMask(i);
glUniform1f(u_stencilValue, i * (1.0f / 255.0f));
}
DrawActiveTexture(0, 0, 0, dstBuffer->width, dstBuffer->height, dstBuffer->width, dstBuffer->height, false, 0.0f, 0.0f, 1.0f, 1.0f, stencilUploadProgram_);
}
glStencilMask(0xFF);
if (currentRenderVfb_) {
RebindFramebuffer();