static int
SW_RenderPoint(SDL_Renderer * renderer, int x, int y)
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
SDL_Rect rect;
int status;
rect.x = x;
rect.y = y;
rect.w = 1;
rect.h = 1;
if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
SDL_AddDirtyRect(&data->dirty, &rect);
}
if (data->renderer->LockTexture(data->renderer,
data->texture[data->current_texture],
&rect, 1,
&data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
data->surface.w = 1;
data->surface.h = 1;
data->surface.clip_rect.w = 1;
data->surface.clip_rect.h = 1;
if (renderer->blendMode == SDL_BLENDMODE_NONE ||
renderer->blendMode == SDL_BLENDMODE_MASK) {
Uint32 color =
SDL_MapRGBA(data->surface.format, renderer->r, renderer->g,
renderer->b, renderer->a);
status = SDL_DrawPoint(&data->surface, 0, 0, color);
} else {
status =
SDL_BlendPoint(&data->surface, 0, 0, renderer->blendMode,
renderer->r, renderer->g, renderer->b,
renderer->a);
}
data->renderer->UnlockTexture(data->renderer,
data->texture[data->current_texture]);
return status;
}
int
SDL_BlendLines(SDL_Surface * dst, const SDL_Point * points, int count,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
int i;
int x1, y1;
int x2, y2;
SDL_bool draw_end;
BlendLineFunc func;
if (!dst) {
SDL_SetError("SDL_BlendLines(): Passed NULL destination surface");
return -1;
}
func = SDL_CalculateBlendLineFunc(dst->format);
if (!func) {
SDL_SetError("SDL_BlendLines(): Unsupported surface format");
return -1;
}
for (i = 1; i < count; ++i) {
x1 = points[i-1].x;
y1 = points[i-1].y;
x2 = points[i].x;
y2 = points[i].y;
/* Perform clipping */
/* FIXME: We don't actually want to clip, as it may change line slope */
if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
continue;
}
/* Draw the end if it was clipped */
draw_end = (x2 != points[i].x || y2 != points[i].y);
func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, draw_end);
}
if (points[0].x != points[count-1].x || points[0].y != points[count-1].y) {
SDL_BlendPoint(dst, points[count-1].x, points[count-1].y,
blendMode, r, g, b, a);
}
return 0;
}
static int
SDL_DUMMY_RenderPoint(SDL_Renderer * renderer, int x, int y)
{
SDL_DUMMY_RenderData *data =
(SDL_DUMMY_RenderData *) renderer->driverdata;
SDL_Surface *target = data->screens[data->current_screen];
int status;
if (renderer->blendMode == SDL_BLENDMODE_NONE ||
renderer->blendMode == SDL_BLENDMODE_MASK) {
Uint32 color =
SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
renderer->a);
status = SDL_DrawPoint(target, x, y, color);
} else {
status =
SDL_BlendPoint(target, x, y, renderer->blendMode, renderer->r,
renderer->g, renderer->b, renderer->a);
}
return status;
}
/**
* @brief Tests the SDL primitives with alpha for rendering.
*/
static void surface_testPrimitivesBlend( SDL_Surface *testsur )
{
int ret;
int i, j;
SDL_Rect rect;
SDL_ATbegin( "Primitives Blend Test" );
/* Clear surface. */
ret = SDL_FillRect( testsur, NULL,
SDL_MapRGB( testsur->format, 0, 0, 0 ) );
if (SDL_ATassert( "SDL_FillRect", ret == 0))
return;
/* Create some rectangles for each blend mode. */
ret = SDL_BlendRect( testsur, NULL, SDL_BLENDMODE_NONE, 255, 255, 255, 0 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 10;
rect.y = 25;
rect.w = 40;
rect.h = 25;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_ADD, 240, 10, 10, 75 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 30;
rect.y = 40;
rect.w = 45;
rect.h = 15;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_BLEND, 10, 240, 10, 100 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 25;
rect.y = 25;
rect.w = 25;
rect.h = 25;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_MOD, 10, 10, 240, 125 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
/* Draw blended lines, lines for everyone. */
for (i=0; i<testsur->w; i+=2) {
ret = SDL_BlendLine( testsur, 0, 0, i, 59,
(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :
(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
60+2*i, 240-2*i, 50, 3*i );
if (SDL_ATassert( "SDL_BlendLine", ret == 0))
return;
}
for (i=0; i<testsur->h; i+=2) {
ret = SDL_BlendLine( testsur, 0, 0, 79, i,
(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :
(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
60+2*i, 240-2*i, 50, 3*i );
if (SDL_ATassert( "SDL_BlendLine", ret == 0))
return;
}
/* Draw points. */
for (j=0; j<testsur->h; j+=3) {
for (i=0; i<testsur->w; i+=3) {
ret = SDL_BlendPoint( testsur, i, j,
((((i+j)/3)%3)==0) ? SDL_BLENDMODE_BLEND :
((((i+j)/3)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
j*4, i*3, j*4, i*3 );
if (SDL_ATassert( "SDL_BlendPoint", ret == 0))
return;
}
}
/* See if it's the same. */
if (SDL_ATassert( "Primitives output not the same.",
surface_compare( testsur, &img_blend )==0 ))
return;
SDL_ATend();
}
