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comparison src/video/SDL_renderer_gles.c @ 4525:3abf0b9cafad

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pelya 2010-07-12 03:53:48 PDT In function GLES_RenderCopy() in SDL_renderer_gles.c:819 there is one memcpy() that can be avoided if we're updating whole texture. Because of that the SDL 1.3 in compatibility mode is working even slower than software rendering in SDL 1.2.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 14 Jul 2010 07:31:35 -0700
parents f7b03b6838cb
children aa8888658021
comparison
equal deleted inserted replaced
4524:a256e1dadf3f 4525:3abf0b9cafad
820 we must do this reformatting ourselves(!) 820 we must do this reformatting ourselves(!)
821 821
822 maybe it'd be a good idea to keep a temp buffer around 822 maybe it'd be a good idea to keep a temp buffer around
823 for this purpose rather than allocating it each time 823 for this purpose rather than allocating it each time
824 */ 824 */
825 temp_buffer = SDL_malloc(rect->w * rect->h * bpp); 825 if( rect->x == 0 && rect->w * bpp == pitch ) {
826 temp_ptr = temp_buffer; 826 temp_buffer = pixels; /* Updating whole texture, no need to reformat */
827 for (i = 0; i < rect->h; i++) { 827 } else {
828 SDL_memcpy(temp_ptr, pixels, rect->w * bpp); 828 temp_buffer = SDL_malloc(rect->w * rect->h * bpp);
829 temp_ptr += rect->w * bpp; 829 temp_ptr = temp_buffer;
830 pixels += pitch; 830 for (i = 0; i < rect->h; i++) {
831 SDL_memcpy(temp_ptr, pixels, rect->w * bpp);
832 temp_ptr += rect->w * bpp;
833 pixels += pitch;
834 }
831 } 835 }
832 836
833 data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y, 837 data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
834 rect->w, rect->h, texturedata->format, 838 rect->w, rect->h, texturedata->format,
835 texturedata->formattype, temp_buffer); 839 texturedata->formattype, temp_buffer);
836 840
837 SDL_free(temp_buffer); 841 if( temp_buffer != pixels ) {
838 842 SDL_free(temp_buffer);
843 }
839 } 844 }
840 SDL_ClearDirtyRects(&texturedata->dirty); 845 SDL_ClearDirtyRects(&texturedata->dirty);
841 } 846 }
842 847
843 data->glBindTexture(texturedata->type, texturedata->texture); 848 data->glBindTexture(texturedata->type, texturedata->texture);