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Switch: Use PBOs for texture streaming

This commit is contained in:
Vicki Pfau 2018-09-19 16:07:16 -07:00
parent 90c656961e
commit 35d2e0eee9
1 changed files with 24 additions and 4 deletions
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28
src/platform/switch/main.c
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@ -65,13 +65,14 @@ static const char* const _fragmentShader =
static GLuint program;
static GLuint vbo;
static GLuint vao;
static GLuint pbo;
static GLuint texLocation;
static GLuint dimsLocation;
static GLuint insizeLocation;
static GLuint colorLocation;
static GLuint tex;
static color_t frameBuffer[256 * 256];
static color_t* frameBuffer;
static struct mAVStream stream;
static int audioBufferActive;
static struct GBAStereoSample audioBuffer[N_BUFFERS][SAMPLES] __attribute__((__aligned__(0x1000)));
@ -237,14 +238,23 @@ static void _drawFrame(struct mGUIRunner* runner, bool faded) {
if (!frameLimiter && (framecount % FRAME_LIMIT) != 0) {
return;
}
unsigned width, height;
runner->core->desiredVideoDimensions(runner->core, &width, &height);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, tex);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256, height, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
unsigned width, height;
runner->core->desiredVideoDimensions(runner->core, &width, &height);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256, height, GL_RGBA, GL_UNSIGNED_BYTE, frameBuffer);
_drawTex(runner, width, height, faded);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
frameBuffer = glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, 256 * 256 * 4, GL_MAP_WRITE_BIT);
runner->core->setVideoBuffer(runner->core, frameBuffer, 256);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
static void _drawScreenshot(struct mGUIRunner* runner, const color_t* pixels, unsigned width, unsigned height, bool faded) {
@ -343,6 +353,12 @@ int main(int argc, char* argv[]) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glGenBuffers(1, &pbo);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
glBufferData(GL_PIXEL_UNPACK_BUFFER, 256 * 256 * 4, NULL, GL_STREAM_DRAW);
frameBuffer = glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, 256 * 256 * 4, GL_MAP_WRITE_BIT);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
program = glCreateProgram();
GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
@ -487,6 +503,10 @@ int main(int argc, char* argv[]) {
audoutStartAudioOut();
mGUIRunloop(&runner);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
glDeleteBuffers(1, &pbo);
glDeleteTextures(1, &tex);
glDeleteBuffers(1, &vbo);
glDeleteProgram(program);