pandory500/SDL-mirror
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In theory this implements GDI rendering, but it doesn't work for some reason.

Browse source 
Also removed blending support from the advertised interface, since it's not
actually supported.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403388
This commit is contained in:
Sam Lantinga 2008-12-30 04:38:39 +00:00
parent 2b206b6e63
commit b876226c2f
1 changed files with 75 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

78
src/video/win32/SDL_gdirender.c
View file

@ -55,6 +55,9 @@ static int GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GDI_RenderPoint(SDL_Renderer * renderer, int x, int y);
static int GDI_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2,
int y2);
static int GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
static int GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
@ -72,7 +75,7 @@ SDL_RenderDriver GDI_RenderDriver = {
SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED),
(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_ALPHA),
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND),
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK),
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST),
14,
{
@ -172,6 +175,8 @@ GDI_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->UpdateTexture = GDI_UpdateTexture;
renderer->LockTexture = GDI_LockTexture;
renderer->UnlockTexture = GDI_UnlockTexture;
renderer->RenderPoint = GDI_RenderPoint;
renderer->RenderLine = GDI_RenderLine;
renderer->RenderFill = GDI_RenderFill;
renderer->RenderCopy = GDI_RenderCopy;
renderer->RenderPresent = GDI_RenderPresent;
@ -568,6 +573,71 @@ GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
}
}
static int
GDI_RenderPoint(SDL_Renderer * renderer, int x, int y)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
if (data->makedirty) {
SDL_Rect rect;
rect.x = x;
rect.y = y;
rect.w = 1;
rect.h = 1;
SDL_AddDirtyRect(&data->dirty, &rect);
}
SetPixel(data->current_hdc, x, y, RGB(renderer->r, renderer->g, renderer->b));
return 0;
}
static int
GDI_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
POINT points[2];
HBRUSH brush;
BOOL status;
if (data->makedirty) {
SDL_Rect rect;
if (x1 < x2) {
rect.x = x1;
rect.w = (x2 - x1) + 1;
} else {
rect.x = x2;
rect.w = (x1 - x2) + 1;
}
if (y1 < y2) {
rect.y = y1;
rect.h = (y2 - y1) + 1;
} else {
rect.y = y2;
rect.h = (y1 - y2) + 1;
}
SDL_AddDirtyRect(&data->dirty, &rect);
}
/* Should we cache the brushes? .. it looks like GDI does for us. :) */
brush = CreateSolidBrush(RGB(renderer->r, renderer->g, renderer->b));
SelectObject(data->current_hdc, brush);
points[0].x = x1;
points[0].y = y1;
points[1].x = x2;
points[1].y = y2;
status = Polyline(data->current_hdc, points, 2);
DeleteObject(brush);
if (!status) {
WIN_SetError("FillRect()");
return -1;
}
return 0;
}
static int
GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
{
@ -614,14 +684,16 @@ GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
SelectPalette(data->memory_hdc, texturedata->hpal, TRUE);
RealizePalette(data->memory_hdc);
}
if (texture->blendMode & (SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND)) {
if (texture->blendMode & SDL_BLENDMODE_MASK) {
BLENDFUNCTION blendFunc = {
AC_SRC_OVER,
0,
texture->a,
AC_SRC_ALPHA
};
/* FIXME: GDI uses premultiplied alpha! */
/* FIXME: GDI uses premultiplied alpha!
* Once we solve this and somehow support blended drawing we can enable SDL_BLENDMODE_BLEND
*/
if (!AlphaBlend
(data->current_hdc, dstrect->x, dstrect->y, dstrect->w,
dstrect->h, data->memory_hdc, srcrect->x, srcrect->y, srcrect->w,