pandory500/SDL-mirror
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Added the SDL_HINT_RENDER_SCALE_QUALITY hint, which defaults to nearest pixel sampling.

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This commit is contained in:
Sam Lantinga 2011-03-13 11:18:35 -07:00
parent fbc49beee3
commit a19e258730
5 changed files with 79 additions and 9 deletions
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17
src/render/opengles2/SDL_render_gles2.c
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@ -24,6 +24,7 @@
#if SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED
#include "SDL_hints.h"
#include "SDL_opengles2.h"
#include "../SDL_sysrender.h"
#include "SDL_shaders_gles2.h"
@ -234,6 +235,18 @@ static void GLES2_UnlockTexture(SDL_Renderer *renderer, SDL_Texture *texture);
static int GLES2_UpdateTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
const void *pixels, int pitch);
static GLenum
GetScaleQuality(void)
{
const char *hint = SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY);
if (!hint || *hint == '0' || SDL_strcasecmp(hint, "nearest") == 0) {
return GL_NEAREST;
} else {
return GL_LINEAR;
}
}
static int
GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
{
@ -266,7 +279,7 @@ GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
tdata->texture_type = GL_TEXTURE_2D;
tdata->pixel_format = format;
tdata->pixel_type = type;
tdata->scaleMode = GL_LINEAR;
tdata->scaleMode = GetScaleQuality();
/* Allocate a blob for image data */
if (texture->access == SDL_TEXTUREACCESS_STREAMING)
@ -286,8 +299,6 @@ GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
glGenTextures(1, &tdata->texture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(tdata->texture_type, tdata->texture);
glTexParameteri(tdata->texture_type, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(tdata->texture_type, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(tdata->texture_type, 0, format, texture->w, texture->h, 0, format, type, NULL);