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GBA Video: Do not affect OBJ pixel priority when writing OBJWIN (fixes #1890)

This commit is contained in:
Vicki Pfau 2020-10-04 01:02:28 -07:00
parent a3d5e3481f
commit b3d97a4389
2 changed files with 23 additions and 13 deletions
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1
CHANGES
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@ -47,6 +47,7 @@ Emulation fixes:
- GBA Video: Implement green swap (fixes mgba.io/i/1609)
- GBA Video: Fix rare regression blending semitransparent sprites (fixes mgba.io/i/1876)
- GBA Video: Emulate sprite cycle limits in OpenGL renderer (fixes mgba.io/i/1635)
- GBA Video: Do not affect OBJ pixel priority when writing OBJWIN (fixes mgba.io/i/1890)
- SM83: Emulate HALT bug
Other fixes:
- 3DS: Redo video sync to be more precise

35
src/gba/renderers/gl.c
View File

@ -898,6 +898,7 @@ void GBAVideoGLRendererDeinit(struct GBAVideoRenderer* renderer) {
_deleteShader(&glRenderer->bgShader[3]);
_deleteShader(&glRenderer->objShader[0]);
_deleteShader(&glRenderer->objShader[1]);
_deleteShader(&glRenderer->objShader[2]);
_deleteShader(&glRenderer->finalizeShader);
int i;
@ -1712,12 +1713,18 @@ void GBAVideoGLRendererDrawSprite(struct GBAVideoGLRenderer* renderer, struct GB
}
glUniform4i(uniforms[GBA_GL_OBJ_DIMS], width, height, totalWidth, totalHeight);
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);
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);
glDrawBuffers(2, (GLenum[]) { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 });
}
@ -1730,23 +1737,25 @@ void GBAVideoGLRendererDrawSprite(struct GBAVideoGLRenderer* renderer, struct GB
} else {
glUniform4i(uniforms[GBA_GL_OBJ_MOSAIC], 0, 0, x, spriteY);
}
glStencilFunc(GL_ALWAYS, 1, 1);
if (GBAObjAttributesAGetMode(sprite->a) != OBJ_MODE_OBJWIN || GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
shader = &renderer->objShader[2];
uniforms = shader->uniforms;
glStencilFunc(GL_EQUAL, 1, 1);
glUseProgram(shader->program);
glDrawBuffers(2, (GLenum[]) { GL_NONE, GL_COLOR_ATTACHMENT1 });
glBindVertexArray(shader->vao);
glUniform2i(uniforms[GBA_GL_VS_LOC], totalHeight, 0);
glUniform2i(uniforms[GBA_GL_VS_MAXPOS], totalWidth, totalHeight);
glUniform4i(uniforms[GBA_GL_OBJ_INFLAGS], GBAObjAttributesCGetPriority(sprite->c),
(renderer->target1Obj || GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT) | (renderer->target2Obj * 2) | (renderer->blendEffect * 4),
renderer->blda, GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
if (GBAObjAttributesAGetMode(sprite->a) != OBJ_MODE_OBJWIN) {
// Update the pixel priority for already-written pixels
shader = &renderer->objShader[2];
uniforms = shader->uniforms;
glStencilFunc(GL_EQUAL, 1, 1);
glUseProgram(shader->program);
glDrawBuffers(2, (GLenum[]) { GL_NONE, GL_COLOR_ATTACHMENT1 });
glBindVertexArray(shader->vao);
glUniform2i(uniforms[GBA_GL_VS_LOC], totalHeight, 0);
glUniform2i(uniforms[GBA_GL_VS_MAXPOS], totalWidth, totalHeight);
glUniform4i(uniforms[GBA_GL_OBJ_INFLAGS], GBAObjAttributesCGetPriority(sprite->c),
(renderer->target1Obj || GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT) | (renderer->target2Obj * 2) | (renderer->blendEffect * 4),
renderer->blda, GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
glDrawBuffers(1, (GLenum[]) { GL_COLOR_ATTACHMENT0 });
}