static int
GLES_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
int i;
GLshort *vertices;
GLES_SetBlendMode(data, renderer->blendMode, 1);
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
vertices = SDL_stack_alloc(GLshort, count*2);
for (i = 0; i < count; ++i) {
vertices[2*i+0] = (GLshort)points[i].x;
vertices[2*i+1] = (GLshort)points[i].y;
}
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
if (count > 2 &&
points[0].x == points[count-1].x && points[0].y == points[count-1].y) {
/* GL_LINE_LOOP takes care of the final segment */
--count;
data->glDrawArrays(GL_LINE_LOOP, 0, count);
} else {
data->glDrawArrays(GL_LINE_STRIP, 0, count);
}
data->glDisableClientState(GL_VERTEX_ARRAY);
SDL_stack_free(vertices);
return 0;
}
static int
GLES_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
int i;
GLshort *vertices;
GLES_SetBlendMode(data, renderer->blendMode, 1);
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
vertices = SDL_stack_alloc(GLshort, count*2);
for (i = 0; i < count; ++i) {
vertices[2*i+0] = (GLshort)points[i].x;
vertices[2*i+1] = (GLshort)points[i].y;
}
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glDrawArrays(GL_POINTS, 0, count);
data->glDisableClientState(GL_VERTEX_ARRAY);
SDL_stack_free(vertices);
return 0;
}
static int
GLES_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
int i;
GLES_SetBlendMode(data, renderer->blendMode, 1);
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
data->glEnableClientState(GL_VERTEX_ARRAY);
for (i = 0; i < count; ++i) {
const SDL_Rect *rect = rects[i];
GLshort minx = rect->x;
GLshort maxx = rect->x + rect->w;
GLshort miny = rect->y;
GLshort maxy = rect->y + rect->h;
GLshort vertices[8];
vertices[0] = minx;
vertices[1] = miny;
vertices[2] = maxx;
vertices[3] = miny;
vertices[4] = minx;
vertices[5] = maxy;
vertices[6] = maxx;
vertices[7] = maxy;
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
data->glDisableClientState(GL_VERTEX_ARRAY);
return 0;
}
static int
GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata;
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
int i;
void *temp_buffer; /* used for reformatting dirty rect pixels */
void *temp_ptr;
data->glEnable(GL_TEXTURE_2D);
if (texturedata->dirty.list) {
SDL_DirtyRect *dirty;
void *pixels;
int bpp = SDL_BYTESPERPIXEL(texture->format);
int pitch = texturedata->pitch;
SetupTextureUpdate(data, texture, pitch);
data->glBindTexture(texturedata->type, texturedata->texture);
for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
SDL_Rect *rect = &dirty->rect;
pixels =
(void *) ((Uint8 *) texturedata->pixels + rect->y * pitch +
rect->x * bpp);
/* There is no GL_UNPACK_ROW_LENGTH in OpenGLES
we must do this reformatting ourselves(!)
maybe it'd be a good idea to keep a temp buffer around
for this purpose rather than allocating it each time
*/
temp_buffer = SDL_malloc(rect->w * rect->h * bpp);
temp_ptr = temp_buffer;
for (i = 0; i < rect->h; i++) {
SDL_memcpy(temp_ptr, pixels, rect->w * bpp);
temp_ptr += rect->w * bpp;
pixels += pitch;
}
data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
rect->w, rect->h, texturedata->format,
texturedata->formattype, temp_buffer);
SDL_free(temp_buffer);
}
SDL_ClearDirtyRects(&texturedata->dirty);
}
data->glBindTexture(texturedata->type, texturedata->texture);
if (texture->modMode) {
data->glColor4f((GLfloat) texture->r * inv255f,
(GLfloat) texture->g * inv255f,
(GLfloat) texture->b * inv255f,
(GLfloat) texture->a * inv255f);
} else {
data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
}
GLES_SetBlendMode(data, texture->blendMode, 0);
switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST:
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
break;
case SDL_TEXTURESCALEMODE_SLOW:
case SDL_TEXTURESCALEMODE_BEST:
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
break;
}
if (data->GL_OES_draw_texture_supported && data->useDrawTexture) {
/* this code is a little funny because the viewport is upside down vs SDL's coordinate system */
SDL_Window *window = renderer->window;
GLint cropRect[4];
cropRect[0] = srcrect->x;
cropRect[1] = srcrect->y + srcrect->h;
cropRect[2] = srcrect->w;
cropRect[3] = -srcrect->h;
data->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES,
cropRect);
data->glDrawTexiOES(dstrect->x, window->h - dstrect->y - dstrect->h,
0, dstrect->w, dstrect->h);
} else {
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;
GLshort vertices[8];
GLfloat texCoords[8];
vertices[0] = minx;
vertices[1] = miny;
vertices[2] = maxx;
vertices[3] = miny;
vertices[4] = minx;
vertices[5] = maxy;
vertices[6] = maxx;
vertices[7] = maxy;
texCoords[0] = minu;
texCoords[1] = minv;
texCoords[2] = maxu;
texCoords[3] = minv;
texCoords[4] = minu;
texCoords[5] = maxv;
texCoords[6] = maxu;
texCoords[7] = maxv;
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
data->glEnableClientState(GL_TEXTURE_COORD_ARRAY);
data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
data->glDisableClientState(GL_TEXTURE_COORD_ARRAY);
data->glDisableClientState(GL_VERTEX_ARRAY);
}
data->glDisable(GL_TEXTURE_2D);
return 0;
}