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OpenGL: Add basic border rendering to modern GL driver

This commit is contained in:
Vicki Pfau 2023-02-22 23:36:57 -08:00
parent 09a53abe99
commit c7e4db58e3
2 changed files with 48 additions and 20 deletions
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66
src/platform/opengl/gles2.c
View File

@ -206,7 +206,10 @@ static void mGLES2ContextSetLayerDimensions(struct VideoBackend* v, enum VideoLa
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dims->width, dims->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
#endif
if (layer == VIDEO_LAYER_BACKGROUND) {
unsigned newW;
unsigned newH;
VideoBackendGetFrameSize(v, &newW, &newH);
if (newW != context->width || newH != context->height) {
size_t n;
for (n = 0; n < context->nShaders; ++n) {
if (context->shaders[n].width < 0 || context->shaders[n].height < 0) {
@ -215,6 +218,8 @@ static void mGLES2ContextSetLayerDimensions(struct VideoBackend* v, enum VideoLa
}
context->initialShader.dirty = true;
context->interframeShader.dirty = true;
context->width = newW;
context->height = newH;
}
}
@ -241,9 +246,8 @@ static void mGLES2ContextResized(struct VideoBackend* v, unsigned w, unsigned h)
unsigned drawW = w;
unsigned drawH = h;
unsigned maxW;
unsigned maxH;
VideoBackendGetFrameSize(v, &maxW, &maxH);
unsigned maxW = context->width;
unsigned maxH = context->height;
if (v->lockAspectRatio) {
lockAspectRatioUInt(maxW, maxH, &drawW, &drawH);
@ -272,7 +276,7 @@ static void mGLES2ContextClear(struct VideoBackend* v) {
glClear(GL_COLOR_BUFFER_BIT);
}
void _drawShader(struct mGLES2Context* context, struct mGLES2Shader* shader) {
static void _drawShaderEx(struct mGLES2Context* context, struct mGLES2Shader* shader, int layer) {
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
int drawW = shader->width;
@ -283,19 +287,19 @@ void _drawShader(struct mGLES2Context* context, struct mGLES2Shader* shader) {
drawW = viewport[2];
padW = viewport[0];
} else if (shader->width < 0) {
drawW = context->layerDims[VIDEO_LAYER_IMAGE].width * -shader->width;
drawW = context->width * -shader->width;
}
if (!drawH) {
drawH = viewport[3];
padH = viewport[1];
} else if (shader->height < 0) {
drawH = context->layerDims[VIDEO_LAYER_IMAGE].height * -shader->height;
drawH = context->height * -shader->height;
}
if (shader->integerScaling) {
padW = 0;
padH = 0;
drawW -= drawW % context->layerDims[VIDEO_LAYER_IMAGE].width;
drawH -= drawH % context->layerDims[VIDEO_LAYER_IMAGE].height;
drawW -= drawW % context->width;
drawH -= drawH % context->height;
}
if (shader->dirty) {
@ -309,22 +313,29 @@ void _drawShader(struct mGLES2Context* context, struct mGLES2Shader* shader) {
shader->dirty = false;
}
if (layer >= 0 && layer < VIDEO_LAYER_MAX) {
glViewport(context->layerDims[layer].x, context->layerDims[layer].y, context->layerDims[layer].width, context->layerDims[layer].height);
} else {
glViewport(padW, padH, drawW, drawH);
}
glBindFramebuffer(GL_FRAMEBUFFER, shader->fbo);
glViewport(padW, padH, drawW, drawH);
if (shader->blend) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
} else {
glDisable(GL_BLEND);
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
if (layer <= VIDEO_LAYER_BACKGROUND) {
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
}
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, shader->filter ? GL_LINEAR : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, shader->filter ? GL_LINEAR : GL_NEAREST);
glUseProgram(shader->program);
glUniform1i(shader->texLocation, 0);
glUniform2f(shader->texSizeLocation, context->layerDims[VIDEO_LAYER_IMAGE].width, context->layerDims[VIDEO_LAYER_IMAGE].height);
glUniform2f(shader->texSizeLocation, context->width, context->height);
glUniform2f(shader->outputSizeLocation, drawW, drawH);
#ifdef BUILD_GLES3
if (shader->vao != (GLuint) -1) {
@ -391,21 +402,36 @@ void _drawShader(struct mGLES2Context* context, struct mGLES2Shader* shader) {
glBindTexture(GL_TEXTURE_2D, shader->tex);
}
static void _drawShader(struct mGLES2Context* context, struct mGLES2Shader* shader) {
_drawShaderEx(context, shader, -1);
}
void mGLES2ContextDrawFrame(struct VideoBackend* v) {
struct mGLES2Context* context = (struct mGLES2Context*) v;
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, context->tex[VIDEO_LAYER_IMAGE]);
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
context->finalShader.filter = v->filter;
_drawShader(context, &context->initialShader);
if (v->interframeBlending) {
context->interframeShader.blend = true;
glViewport(0, 0, viewport[2], viewport[3]);
_drawShader(context, &context->interframeShader);
int layer;
for (layer = 0; layer <= VIDEO_LAYER_IMAGE; ++layer) {
if (context->layerDims[layer].width < 1 || context->layerDims[layer].height < 1) {
continue;
}
glBindTexture(GL_TEXTURE_2D, context->tex[layer]);
_drawShaderEx(context, &context->initialShader, layer);
if (layer != VIDEO_LAYER_IMAGE) {
continue;
}
if (v->interframeBlending) {
context->interframeShader.blend = true;
glViewport(0, 0, viewport[2], viewport[3]);
_drawShader(context, &context->interframeShader);
}
}
size_t n;
for (n = 0; n < context->nShaders; ++n) {
glViewport(0, 0, viewport[2], viewport[3]);
@ -416,7 +442,7 @@ void mGLES2ContextDrawFrame(struct VideoBackend* v) {
if (v->interframeBlending) {
context->interframeShader.blend = false;
glBindTexture(GL_TEXTURE_2D, context->tex[VIDEO_LAYER_IMAGE]);
_drawShader(context, &context->initialShader);
_drawShaderEx(context, &context->initialShader, VIDEO_LAYER_IMAGE);
glViewport(0, 0, viewport[2], viewport[3]);
_drawShader(context, &context->interframeShader);
}

2
src/platform/opengl/gles2.h
View File

@ -83,6 +83,8 @@ struct mGLES2Context {
GLuint vbo;
struct Rectangle layerDims[VIDEO_LAYER_MAX];
unsigned width;
unsigned height;
struct mGLES2Shader initialShader;
struct mGLES2Shader finalShader;