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GBA Video: Better batching/depth testing

This commit is contained in:
Vicki Pfau 2019-05-10 12:17:19 -07:00
parent 1a04532d4b
commit 51a174e4c5
1 changed files with 28 additions and 21 deletions
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25
src/gba/renderers/gl.c
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@ -43,14 +43,14 @@ static const GLchar* const _gl3Header =
static const char* const _vertexShader =
"attribute vec2 position;\n"
"uniform ivec2 loc;\n"
"const ivec2 maxPos = ivec2(240, 160);\n"
"uniform ivec3 loc;\n"
"const ivec3 maxPos = ivec3(240, 160, 32);\n"
"varying vec2 texCoord;\n"
"void main() {\n"
" vec2 local = (position + vec2(0, loc.y)) / vec2(1., maxPos.y);\n"
" gl_Position = vec4(local * 2. - 1., 0., 1.);\n"
" texCoord = local * maxPos;\n"
" vec2 local = (position * loc.x + vec2(0, loc.y)) / vec2(1., maxPos.y);\n"
" gl_Position = vec4(local * 2. - 1., loc.z / float(maxPos.z), 1.);\n"
" texCoord = local * maxPos.xy;\n"
"}";
static const char* const _renderTile16 =
@ -531,7 +531,12 @@ void GBAVideoGLRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
glBindFramebuffer(GL_FRAMEBUFFER, glRenderer->fbo[1]);
glEnable(GL_SCISSOR_TEST);
glScissor(0, y, GBA_VIDEO_HORIZONTAL_PIXELS, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
if (y == 0) {
glClearDepthf(1);
glClear(GL_DEPTH_BUFFER_BIT);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
unsigned priority;
@ -687,7 +692,7 @@ void GBAVideoGLRendererDrawBackgroundMode0(struct GBAVideoGLRenderer* renderer,
glBindTexture(GL_TEXTURE_2D, renderer->vramTex);
glActiveTexture(GL_TEXTURE0 + 1);
glBindTexture(GL_TEXTURE_2D, renderer->paletteTex);
glUniform2i(0, 0, y);
glUniform3i(0, 1, y, 0);
glUniform1i(1, 0);
glUniform1i(2, 1);
glUniform1i(3, background->screenBase);
@ -698,20 +703,22 @@ void GBAVideoGLRendererDrawBackgroundMode0(struct GBAVideoGLRenderer* renderer,
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
if ((y & 0x1F) == 0x1F) {
glBindFramebuffer(GL_FRAMEBUFFER, renderer->fbo[1]);
glViewport(0, 0, GBA_VIDEO_HORIZONTAL_PIXELS, GBA_VIDEO_VERTICAL_PIXELS);
glScissor(0, y, GBA_VIDEO_HORIZONTAL_PIXELS, 1);
glScissor(0, y & ~0x1F, GBA_VIDEO_HORIZONTAL_PIXELS, 0x20);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glUseProgram(renderer->compositeProgram);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, background->tex);
glUniform2i(0, (background->priority << 3) + (background->index << 1) + 1, y);
glUniform3i(0, 0x20, y & ~0x1F, (background->priority << 3) + (background->index << 1) + 1);
glUniform1i(1, 0);
glVertexAttribPointer(0, 2, GL_INT, GL_FALSE, 0, _vertices);
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisable(GL_DEPTH_TEST);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}