static int
GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
GLenum result;
GL_ActivateRenderer(renderer);
renderdata->glGetError();
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
(pitch / SDL_BYTESPERPIXEL(texture->format)));
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
rect->h, data->format, data->formattype,
pixels);
if (data->yuv) {
const void *top;
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, (pitch / 2));
/* Skip to the top of the next texture */
top = (const void*)((const Uint8*)pixels + (texture->h-rect->y) * pitch - rect->x);
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)top + (rect->y / 2) * pitch + rect->x / 2);
if (texture->format == SDL_PIXELFORMAT_YV12) {
renderdata->glBindTexture(data->type, data->vtexture);
} else {
renderdata->glBindTexture(data->type, data->utexture);
}
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, pixels);
/* Skip to the top of the next texture */
top = (const void*)((const Uint8*)top + (texture->h * pitch)/4);
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)top + (rect->y / 2) * pitch + rect->x / 2);
if (texture->format == SDL_PIXELFORMAT_YV12) {
renderdata->glBindTexture(data->type, data->utexture);
} else {
renderdata->glBindTexture(data->type, data->vtexture);
}
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, pixels);
}
renderdata->glDisable(data->type);
result = renderdata->glGetError();
if (result != GL_NO_ERROR) {
GL_SetError("glTexSubImage2D()", result);
return -1;
}
return 0;
}
static void
GL_RenderPresent(SDL_Renderer * renderer)
{
GL_ActivateRenderer(renderer);
SDL_GL_SwapWindow(renderer->window);
}
static int
GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = renderer->window;
Uint32 temp_format = SDL_PIXELFORMAT_ARGB8888;
void *temp_pixels;
int temp_pitch;
GLint internalFormat;
GLenum format, type;
Uint8 *src, *dst, *tmp;
int w, h, length, rows;
int status;
GL_ActivateRenderer(renderer);
temp_pitch = rect->w * SDL_BYTESPERPIXEL(temp_format);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
SDL_OutOfMemory();
return -1;
}
convert_format(data, temp_format, &internalFormat, &format, &type);
SDL_GetWindowSize(window, &w, &h);
data->glPixelStorei(GL_PACK_ALIGNMENT, 1);
data->glPixelStorei(GL_PACK_ROW_LENGTH,
(temp_pitch / SDL_BYTESPERPIXEL(temp_format)));
data->glReadPixels(rect->x, (h-rect->y)-rect->h, rect->w, rect->h,
format, type, temp_pixels);
/* Flip the rows to be top-down */
length = rect->w * SDL_BYTESPERPIXEL(temp_format);
src = (Uint8*)temp_pixels + (rect->h-1)*temp_pitch;
dst = (Uint8*)temp_pixels;
tmp = SDL_stack_alloc(Uint8, length);
rows = rect->h / 2;
while (rows--) {
SDL_memcpy(tmp, dst, length);
SDL_memcpy(dst, src, length);
SDL_memcpy(src, tmp, length);
dst += temp_pitch;
src -= temp_pitch;
}
SDL_stack_free(tmp);
status = SDL_ConvertPixels(rect->w, rect->h,
temp_format, temp_pixels, temp_pitch,
pixel_format, pixels, pitch);
SDL_free(temp_pixels);
return status;
}
static int
GL_RenderClear(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_ActivateRenderer(renderer);
data->glClearColor((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
data->glClear(GL_COLOR_BUFFER_BIT);
return 0;
}
static void
GL_SetDrawingState(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_ActivateRenderer(renderer);
GL_SetColor(data, renderer->r,
renderer->g,
renderer->b,
renderer->a);
GL_SetBlendMode(data, renderer->blendMode);
GL_SetShader(data, SHADER_SOLID);
}
static int
GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = renderer->window;
GLint internalFormat;
GLenum format, type;
Uint8 *src, *dst, *tmp;
int w, h, length, rows;
GL_ActivateRenderer(renderer);
if (!convert_format(data, pixel_format, &internalFormat, &format, &type)) {
/* FIXME: Do a temp copy to a format that is supported */
SDL_SetError("Unsupported pixel format");
return -1;
}
SDL_GetWindowSize(window, &w, &h);
data->glPixelStorei(GL_PACK_ALIGNMENT, 1);
data->glPixelStorei(GL_PACK_ROW_LENGTH,
(pitch / SDL_BYTESPERPIXEL(pixel_format)));
data->glReadPixels(rect->x, (h-rect->y)-rect->h, rect->w, rect->h,
format, type, pixels);
/* Flip the rows to be top-down */
length = rect->w * SDL_BYTESPERPIXEL(pixel_format);
src = (Uint8*)pixels + (rect->h-1)*pitch;
dst = (Uint8*)pixels;
tmp = SDL_stack_alloc(Uint8, length);
rows = rect->h / 2;
while (rows--) {
SDL_memcpy(tmp, dst, length);
SDL_memcpy(dst, src, length);
SDL_memcpy(src, tmp, length);
dst += pitch;
src -= pitch;
}
SDL_stack_free(tmp);
return 0;
}
/* This is called if we need to invalidate all of the SDL OpenGL state */
static void
GL_ResetState(SDL_Renderer *renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (SDL_CurrentContext == data->context) {
GL_UpdateViewport(renderer);
} else {
GL_ActivateRenderer(renderer);
}
data->current.shader = SHADER_NONE;
data->current.color = 0;
data->current.blendMode = -1;
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);
/* This ended up causing video discrepancies between OpenGL and Direct3D */
/*data->glEnable(GL_LINE_SMOOTH);*/
data->glMatrixMode(GL_MODELVIEW);
data->glLoadIdentity();
}
static void
GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
if (!data) {
return;
}
if (data->texture) {
renderdata->glDeleteTextures(1, &data->texture);
}
if (data->yuv) {
renderdata->glDeleteTextures(1, &data->utexture);
renderdata->glDeleteTextures(1, &data->vtexture);
}
if (data->pixels) {
SDL_free(data->pixels);
}
SDL_free(data);
texture->driverdata = NULL;
}
static int
GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
GL_ActivateRenderer(renderer);
data->glEnable(texturedata->type);
if (texturedata->yuv) {
data->glActiveTextureARB(GL_TEXTURE2_ARB);
data->glBindTexture(texturedata->type, texturedata->vtexture);
if (texturedata->scaleMode != data->current.scaleMode) {
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
texturedata->scaleMode);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
texturedata->scaleMode);
}
data->glActiveTextureARB(GL_TEXTURE1_ARB);
data->glBindTexture(texturedata->type, texturedata->utexture);
if (texturedata->scaleMode != data->current.scaleMode) {
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
texturedata->scaleMode);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
texturedata->scaleMode);
}
data->glActiveTextureARB(GL_TEXTURE0_ARB);
}
data->glBindTexture(texturedata->type, texturedata->texture);
if (texturedata->scaleMode != data->current.scaleMode) {
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
texturedata->scaleMode);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
texturedata->scaleMode);
data->current.scaleMode = texturedata->scaleMode;
}
if (texture->modMode) {
GL_SetColor(data, texture->r, texture->g, texture->b, texture->a);
} else {
GL_SetColor(data, 255, 255, 255, 255);
}
GL_SetBlendMode(data, texture->blendMode);
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YV12);
} else {
GL_SetShader(data, SHADER_RGB);
}
minx = dstrect->x;
miny = dstrect->y;
maxx = dstrect->x + dstrect->w;
maxy = dstrect->y + dstrect->h;
minu = (GLfloat) srcrect->x / texture->w;
minu *= texturedata->texw;
maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
maxu *= texturedata->texw;
minv = (GLfloat) srcrect->y / texture->h;
minv *= texturedata->texh;
maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
maxv *= texturedata->texh;
data->glBegin(GL_TRIANGLE_STRIP);
data->glTexCoord2f(minu, minv);
data->glVertex2f((GLfloat) minx, (GLfloat) miny);
data->glTexCoord2f(maxu, minv);
data->glVertex2f((GLfloat) maxx, (GLfloat) miny);
data->glTexCoord2f(minu, maxv);
data->glVertex2f((GLfloat) minx, (GLfloat) maxy);
data->glTexCoord2f(maxu, maxv);
data->glVertex2f((GLfloat) maxx, (GLfloat) maxy);
data->glEnd();
data->glDisable(texturedata->type);
return 0;
}
static int
GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data;
GLint internalFormat;
GLenum format, type;
int texture_w, texture_h;
GLenum result;
GL_ActivateRenderer(renderer);
if (!convert_format(renderdata, texture->format, &internalFormat,
&format, &type)) {
SDL_SetError("Texture format %s not supported by OpenGL",
SDL_GetPixelFormatName(texture->format));
return -1;
}
data = (GL_TextureData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_OutOfMemory();
return -1;
}
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
size_t size;
data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
size = texture->h * data->pitch;
if (texture->format == SDL_PIXELFORMAT_YV12 ||
texture->format == SDL_PIXELFORMAT_IYUV) {
/* Need to add size for the U and V planes */
size += (2 * (texture->h * data->pitch) / 4);
}
data->pixels = SDL_malloc(size);
if (!data->pixels) {
SDL_OutOfMemory();
SDL_free(data);
return -1;
}
}
texture->driverdata = data;
renderdata->glGetError();
renderdata->glGenTextures(1, &data->texture);
if (renderdata->GL_ARB_texture_rectangle_supported) {
data->type = GL_TEXTURE_RECTANGLE_ARB;
texture_w = texture->w;
texture_h = texture->h;
data->texw = (GLfloat) texture_w;
data->texh = (GLfloat) texture_h;
} else {
data->type = GL_TEXTURE_2D;
texture_w = power_of_2(texture->w);
texture_h = power_of_2(texture->h);
data->texw = (GLfloat) (texture->w) / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
}
data->format = format;
data->formattype = type;
data->scaleMode = GL_LINEAR;
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
#ifdef __MACOSX__
#ifndef GL_TEXTURE_STORAGE_HINT_APPLE
#define GL_TEXTURE_STORAGE_HINT_APPLE 0x85BC
#endif
#ifndef STORAGE_CACHED_APPLE
#define STORAGE_CACHED_APPLE 0x85BE
#endif
#ifndef STORAGE_SHARED_APPLE
#define STORAGE_SHARED_APPLE 0x85BF
#endif
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_SHARED_APPLE);
} else {
renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_CACHED_APPLE);
}
if (texture->access == SDL_TEXTUREACCESS_STREAMING
&& texture->format == SDL_PIXELFORMAT_ARGB8888) {
renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, data->pixels);
}
else
#endif
{
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
}
renderdata->glDisable(data->type);
result = renderdata->glGetError();
if (result != GL_NO_ERROR) {
GL_SetError("glTexImage2D()", result);
return -1;
}
if (texture->format == SDL_PIXELFORMAT_YV12 ||
texture->format == SDL_PIXELFORMAT_IYUV) {
data->yuv = SDL_TRUE;
renderdata->glGenTextures(1, &data->utexture);
renderdata->glGenTextures(1, &data->vtexture);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
texture_h/2, 0, format, type, NULL);
renderdata->glBindTexture(data->type, data->vtexture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
texture_h/2, 0, format, type, NULL);
renderdata->glDisable(data->type);
}
return 0;
}