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41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
/// Converts red, green, blue, and alpha components to packed RGBA8.
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#define RGBA8(r,g,b,a) (((r)&0xff)|(((g)&0xff)<<8)|(((b)&0xff)<<16)|(((a)&0xff)<<24))
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/// Same as RGBA8 except with alpha=0xff.
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#define RGBA8_MAXALPHA(r,g,b) RGBA8(r,g,b,0xff)
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/// Do not use viInitialize/viExit when using these.
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void gfxInitDefault(void);
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void gfxExit(void);
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/// Note that "framebuffer" here is technically windowbuffer.
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void gfxWaitForVsync();
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void gfxSwapBuffers();
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u8* gfxGetFramebuffer(u32* width, u32* height);
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size_t gfxGetFramebufferSize(void); /// Use this to get the actual byte-size of the buffer for use with memset/etc, do not calculate the byte-size manually with the width and height from gfxGetFramebuffer. The height returned by gfxGetFramebuffer is the display height not the aligned height.
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void gfxSetDoubleBuffering(bool doubleBuffering);
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void gfxFlushBuffers(void);
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/// Use this to get the pixel-offset in the framebuffer. Returned value is in pixels, not bytes.
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/// This implements tegra blocklinear, with hard-coded constants etc.
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static inline u32 gfxGetFramebufferDisplayOffset(u32 x, u32 y) {
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u32 width=0, height=0;
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u32 tilepos, tmp_pos;
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gfxGetFramebuffer(&width, &height);
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if (x >= width) x = width-1;
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if (y >= height) y = height-1;
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y = height-1-y;
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tilepos = ((y & 127) / 16) + (x/16*8) + ((y/16/8)*(width/16*8));
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tilepos = tilepos*16*16 * 4;
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tmp_pos = ((y%16)/8)*512 + ((x%16)/8)*256 + ((y%8)/2)*64 + ((x%8)/4)*32 + (y%2)*16 + (x%4)*4;//This line is a modified version of code from the Tegra X1 datasheet.
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return (tilepos + tmp_pos) / 4;
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}
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