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Added function SDL_RenderSetClipRect()

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This commit is contained in:
Sam Lantinga 2011-02-07 20:06:26 -08:00
parent 42bac7a31e
commit 8253658837
9 changed files with 140 additions and 24 deletions
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66
src/render/opengles2/SDL_render_gles2.c
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@ -133,10 +133,10 @@ typedef struct GLES2_DriverContext
* Renderer state APIs *
*************************************************************************************************/
static int GLES2_ActivateRenderer(SDL_Renderer *renderer);
static void GLES2_WindowEvent(SDL_Renderer * renderer,
const SDL_WindowEvent *event);
static int GLES2_ActivateRenderer(SDL_Renderer *renderer);
static int GLES2_DisplayModeChanged(SDL_Renderer *renderer);
static void GLES2_SetClipRect(SDL_Renderer * renderer, const SDL_Rect * rect);
static void GLES2_DestroyRenderer(SDL_Renderer *renderer);
static SDL_GLContext SDL_CurrentContext = NULL;
@ -178,6 +178,22 @@ GLES2_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
}
}
static void
GLES2_SetClipRect(SDL_Renderer * renderer, const SDL_Rect * rect)
{
GLES2_ActivateRenderer(renderer);
if (rect) {
int w, h;
SDL_GetWindowSize(renderer->window, &w, &h);
glScissor(rect->x, (h-(rect->y+rect->h)), rect->w, rect->h);
glEnable(GL_SCISSOR_TEST);
} else {
glDisable(GL_SCISSOR_TEST);
}
}
static void
GLES2_DestroyRenderer(SDL_Renderer *renderer)
{
@ -761,6 +777,8 @@ GLES2_SetOrthographicProjection(SDL_Renderer *renderer)
* Rendering functions *
*************************************************************************************************/
static const float inv255f = 1.0f / 255.0f;
static int GLES2_RenderClear(SDL_Renderer *renderer);
static int GLES2_RenderDrawPoints(SDL_Renderer *renderer, const SDL_Point *points, int count);
static int GLES2_RenderDrawLines(SDL_Renderer *renderer, const SDL_Point *points, int count);
@ -772,10 +790,10 @@ static void GLES2_RenderPresent(SDL_Renderer *renderer);
static int
GLES2_RenderClear(SDL_Renderer *renderer)
{
float r = (float)renderer->r / 255.0f;
float g = (float)renderer->g / 255.0f;
float b = (float)renderer->b / 255.0f;
float a = (float)renderer->a / 255.0f;
float r = (float)renderer->r * inv255f;
float g = (float)renderer->g * inv255f;
float b = (float)renderer->b * inv255f;
float a = (float)renderer->a * inv255f;
GLES2_ActivateRenderer(renderer);
@ -832,10 +850,10 @@ GLES2_RenderDrawPoints(SDL_Renderer *renderer, const SDL_Point *points, int coun
locColor = rdata->current_program->uniform_locations[GLES2_UNIFORM_COLOR];
glGetError();
glUniform4f(locColor,
renderer->r / 255.0f,
renderer->g / 255.0f,
renderer->b / 255.0f,
alpha / 255.0f);
renderer->r * inv255f,
renderer->g * inv255f,
renderer->b * inv255f,
alpha * inv255f);
/* Configure the correct blend mode */
GLES2_SetBlendMode(blendMode);
@ -886,10 +904,10 @@ GLES2_RenderDrawLines(SDL_Renderer *renderer, const SDL_Point *points, int count
locColor = rdata->current_program->uniform_locations[GLES2_UNIFORM_COLOR];
glGetError();
glUniform4f(locColor,
renderer->r / 255.0f,
renderer->g / 255.0f,
renderer->b / 255.0f,
alpha / 255.0f);
renderer->r * inv255f,
renderer->g * inv255f,
renderer->b * inv255f,
alpha * inv255f);
/* Configure the correct blend mode */
GLES2_SetBlendMode(blendMode);
@ -940,10 +958,10 @@ GLES2_RenderFillRects(SDL_Renderer *renderer, const SDL_Rect **rects, int count)
locColor = rdata->current_program->uniform_locations[GLES2_UNIFORM_COLOR];
glGetError();
glUniform4f(locColor,
renderer->r / 255.0f,
renderer->g / 255.0f,
renderer->b / 255.0f,
alpha / 255.0f);
renderer->r * inv255f,
renderer->g * inv255f,
renderer->b * inv255f,
alpha * inv255f);
/* Configure the correct blend mode */
GLES2_SetBlendMode(blendMode);
@ -1014,10 +1032,10 @@ GLES2_RenderCopy(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *s
/* Configure color modulation */
locModulation = rdata->current_program->uniform_locations[GLES2_UNIFORM_MODULATION];
glUniform4f(locModulation,
texture->r / 255.0f,
texture->g / 255.0f,
texture->b / 255.0f,
alpha / 255.0f);
texture->r * inv255f,
texture->g * inv255f,
texture->b * inv255f,
alpha * inv255f);
/* Emit the textured quad */
glEnableVertexAttribArray(GLES2_ATTRIBUTE_TEXCOORD);
@ -1066,6 +1084,9 @@ GLES2_RenderPresent(SDL_Renderer *renderer)
#define GL_NVIDIA_PLATFORM_BINARY_NV 0x890B
/* Used to re-create the window with OpenGL capability */
extern int SDL_RecreateWindow(SDL_Window * window, Uint32 flags);
static SDL_Renderer *
GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
{
@ -1168,6 +1189,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
renderer->UpdateTexture = &GLES2_UpdateTexture;
renderer->LockTexture = &GLES2_LockTexture;
renderer->UnlockTexture = &GLES2_UnlockTexture;
renderer->SetClipRect = &GLES2_SetClipRect;
renderer->RenderClear = &GLES2_RenderClear;
renderer->RenderDrawPoints = &GLES2_RenderDrawPoints;
renderer->RenderDrawLines = &GLES2_RenderDrawLines;