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GBA Video: Fix OBJWIN erratic rendering in OpenGL renderer

This commit is contained in:
Vicki Pfau 2020-11-22 00:46:55 -08:00
parent 65c988aaad
commit 7d2020910d
2 changed files with 7 additions and 5 deletions
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1
CHANGES
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@ -4,6 +4,7 @@ Emulation fixes:
- GBA I/O: Ignore high bits on IME
- GBA Memory: Mark Famicom Mini games 22 through 28 as non-mirroring
- GBA Memory: Return correct byte for odd ROM open bus addresses
- GBA Video: Fix OBJWIN erratic rendering in OpenGL renderer
Other fixes:
- CMake: Fix build with downstream minizip that exports incompatible symbols
- Core: Fix threading improperly setting paused state while interrupted

11
src/gba/renderers/gl.c
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@ -445,7 +445,7 @@ static const char* const _renderObj =
"uniform ivec4 inflags;\n"
"uniform mat2x2 transform;\n"
"uniform ivec4 dims;\n"
"uniform ivec4 objwin;\n"
"uniform ivec3 objwin;\n"
"uniform ivec4 mosaic;\n"
"OUT(0) out vec4 color;\n"
"OUT(1) out ivec4 flags;\n"
@ -474,7 +474,7 @@ static const char* const _renderObj =
" color = pix;\n"
" flags = inflags;\n"
" gl_FragDepth = float(flags.x) / 16.;\n"
" window = ivec4(objwin.yzw, 0);\n"
" window = ivec4(objwin, 0);\n"
"}";
static const struct GBAVideoGLUniform _uniformsObjPriority[] = {
@ -1431,7 +1431,6 @@ void _drawScanlines(struct GBAVideoGLRenderer* glRenderer, int y) {
if (GBARegisterDISPCNTIsObjEnable(glRenderer->dispcnt) && !glRenderer->d.disableOBJ) {
int i;
glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
glEnable(GL_STENCIL_TEST);
glDepthFunc(GL_LESS);
for (i = 0; i < glRenderer->oamMax; ++i) {
struct GBAVideoRendererSprite* sprite = &glRenderer->sprites[i];
@ -1708,20 +1707,21 @@ void GBAVideoGLRendererDrawSprite(struct GBAVideoGLRenderer* renderer, struct GB
glUniformMatrix2fv(uniforms[GBA_GL_OBJ_TRANSFORM], 1, GL_FALSE, (GLfloat[]) { flipX, 0, 0, flipY });
}
glUniform4i(uniforms[GBA_GL_OBJ_DIMS], width, height, totalWidth, totalHeight);
glDisable(GL_STENCIL_TEST);
if (GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_OBJWIN) {
// OBJWIN writes do not affect pixel priority
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glStencilMask(GL_FALSE);
int window = renderer->objwin & 0x3F;
glUniform4i(uniforms[GBA_GL_OBJ_OBJWIN], 1, window, renderer->bldb, renderer->bldy);
glUniform3i(uniforms[GBA_GL_OBJ_OBJWIN], window, renderer->bldb, renderer->bldy);
glDrawBuffers(3, (GLenum[]) { GL_NONE, GL_NONE, GL_COLOR_ATTACHMENT2 });
} else {
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glStencilMask(GL_TRUE);
glStencilFunc(GL_ALWAYS, 1, 1);
glUniform4i(uniforms[GBA_GL_OBJ_OBJWIN], 0, 0, 0, 0);
glUniform3i(uniforms[GBA_GL_OBJ_OBJWIN], 0, 0, 0);
glDrawBuffers(2, (GLenum[]) { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 });
}
if (GBAObjAttributesAIsMosaic(sprite->a) && GBAObjAttributesAGetMode(sprite->a) != OBJ_MODE_OBJWIN) {
@ -1741,6 +1741,7 @@ void GBAVideoGLRendererDrawSprite(struct GBAVideoGLRenderer* renderer, struct GB
// Update the pixel priority for already-written pixels
shader = &renderer->objShader[2];
uniforms = shader->uniforms;
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_EQUAL, 1, 1);
glUseProgram(shader->program);
glDrawBuffers(2, (GLenum[]) { GL_NONE, GL_COLOR_ATTACHMENT1 });