pandory500/SDL-mirror
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Solved the performance problems by introducing the concept of a single-buffered

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display, which is a fast path used for the whole-surface SDL 1.2 API.
Solved the flicker problems by implementing a backbuffer in the GDI renderer.

Unfortunately, now using the GDI renderer with a backbuffer and HBITMAPs is
significantly slower than SDL's surface code.  *sigh*

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401942
This commit is contained in:
Sam Lantinga 2006-07-12 06:39:26 +00:00
parent 58d76aea10
commit d1be2d9e1c
5 changed files with 184 additions and 96 deletions
Download patch file Download diff file Expand all files Collapse all files

45
src/video/SDL_renderer_sw.c
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@ -77,12 +77,11 @@ SDL_RenderDriver SDL_SW_RenderDriver = {
SDL_SW_CreateRenderer,
{
"software",
(SDL_Renderer_PresentDiscard |
SDL_Renderer_PresentCopy |
SDL_Renderer_PresentFlip2 |
SDL_Renderer_PresentFlip3 | SDL_Renderer_RenderTarget),
(SDL_TextureBlendMode_None |
SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend),
(SDL_Renderer_SingleBuffer | SDL_Renderer_PresentCopy |
SDL_Renderer_PresentFlip2 | SDL_Renderer_PresentFlip3 |
SDL_Renderer_PresentDiscard | SDL_Renderer_RenderTarget),
(SDL_TextureBlendMode_None | SDL_TextureBlendMode_Mask |
SDL_TextureBlendMode_Blend),
(SDL_TextureScaleMode_None | SDL_TextureScaleMode_Fast),
11,
{
@ -108,6 +107,7 @@ typedef struct
SDL_Surface *target;
SDL_Renderer *renderer;
SDL_DirtyRectList dirty;
SDL_bool makedirty;
} SDL_SW_RenderData;
SDL_Renderer *
@ -185,13 +185,16 @@ SDL_SW_CreateRenderer(SDL_Window * window, Uint32 flags)
}
data->current_screen = 0;
data->target = data->screens[0];
data->makedirty = SDL_TRUE;
/* Find a render driver that we can use to display data */
for (i = 0; i < display->num_render_drivers; ++i) {
SDL_RenderDriver *driver = &display->render_drivers[i];
if (driver->info.name != SDL_SW_RenderDriver.info.name) {
data->renderer =
driver->CreateRenderer(window, SDL_Renderer_PresentDiscard);
driver->CreateRenderer(window,
(SDL_Renderer_SingleBuffer |
SDL_Renderer_PresentDiscard));
if (data->renderer) {
break;
}
@ -351,8 +354,10 @@ SDL_SW_SelectRenderTexture(SDL_Renderer * renderer, SDL_Texture * texture)
if (texture) {
data->target = (SDL_Surface *) texture->driverdata;
data->makedirty = SDL_FALSE;
} else {
data->target = data->screens[data->current_screen];
data->makedirty = SDL_TRUE;
}
}
@ -364,7 +369,9 @@ SDL_SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
SDL_Rect real_rect = *rect;
Uint8 r, g, b, a;
SDL_AddDirtyRect(&data->dirty, rect);
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, rect);
}
a = (Uint8) ((color >> 24) & 0xFF);
r = (Uint8) ((color >> 16) & 0xFF);
@ -384,7 +391,9 @@ SDL_SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
SDL_AddDirtyRect(&data->dirty, dstrect);
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, dstrect);
}
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_Surface *target = data->target;
@ -450,7 +459,9 @@ SDL_SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
int row;
size_t length;
SDL_AddDirtyRect(&data->dirty, rect);
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, rect);
}
src = (Uint8 *) pixels;
dst =
@ -471,7 +482,6 @@ SDL_SW_RenderPresent(SDL_Renderer * renderer)
SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
SDL_Surface *surface = data->screens[data->current_screen];
SDL_DirtyRect *dirty;
int new_screen;
/* Send the data to the display */
for (dirty = data->dirty.list; dirty; dirty = dirty->next) {
@ -485,19 +495,14 @@ SDL_SW_RenderPresent(SDL_Renderer * renderer)
SDL_ClearDirtyRects(&data->dirty);
data->renderer->RenderPresent(data->renderer);
/* Update the flipping chain, if any */
if (renderer->info.flags & SDL_Renderer_PresentFlip2) {
new_screen = (data->current_screen + 1) % 2;
data->current_screen = (data->current_screen + 1) % 2;
data->target = data->screens[data->current_screen];
} else if (renderer->info.flags & SDL_Renderer_PresentFlip3) {
new_screen = (data->current_screen + 1) % 3;
} else {
new_screen = 0;
data->current_screen = (data->current_screen + 1) % 3;
data->target = data->screens[data->current_screen];
}
if (data->target == data->screens[data->current_screen]) {
data->target = data->screens[new_screen];
}
data->current_screen = new_screen;
}
static void