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Uses 16-bit texture directly

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This commit is contained in:
Themaister 2010-05-27 17:34:10 +02:00
parent 74dc4d0ac2
commit 7aa9aee0a1
1 changed files with 7 additions and 14 deletions
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21
ssnes.c
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@ -58,7 +58,7 @@ static void init_gl(void)
else
glfwSwapInterval(0);
gl_buffer = malloc(256 * 256 * 4);
gl_buffer = malloc(256 * 256 * 2);
if ( !gl_buffer )
{
fprintf(stderr, "Couldn't allocate memory :<\n");
@ -79,7 +79,8 @@ static void init_gl(void)
glPixelStorei(GL_UNPACK_ROW_LENGTH, 256);
glTexImage2D(GL_TEXTURE_2D,
0, GL_RGB, 256, 256, 0, GL_RGBA,
GL_UNSIGNED_INT_8_8_8_8, gl_buffer);
GL_UNSIGNED_SHORT_1_5_5_5_REV, gl_buffer);
}
static void GLFWCALL resize(int width, int height)
@ -173,25 +174,17 @@ static void video_refresh_GL(const uint16_t* data, unsigned width, unsigned heig
glPixelStorei(GL_UNPACK_ROW_LENGTH, width);
uint32_t output[width*height];
uint16_t output[width*height];
int y;
for ( y = 0; y < height; y++ )
{
const uint16_t *src = data + y * 1024;
uint32_t *dst = output + y * width;
uint16_t *dst = output + y * width;
int x;
for ( x = 0; x < width; x++ )
{
uint16_t pixel = *src++;
int r = (pixel & 0x001f) << 3;
int g = (pixel & 0x03e0) >> 2;
int b = (pixel & 0x7c00) >> 7;
*dst++ = (r << 24) | (g << 16) | (b << 8);
}
memcpy(dst, src, width * 2);
}
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, output);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, output);
glLoadIdentity();
glColor3f(1,1,1);