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41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/*
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* glsurface.cpp
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* A 32-bit rendering surface that can quickly blit 8-bit paletted buffers implemented in OpenGL.
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*
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* Copyright © 2018, Alex Dawson. All rights reserved.
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*/
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#ifndef GLSURFACE_H_
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#define GLSURFACE_H_
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#include "compat.h"
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#include "palette.h"
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// Initialize the glsurface with the Software renderer's buffer resolution.
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// If the Software renderer's resolution and the actual resolution don't match,
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// glsurface will still render at the full size of the screen.
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// If a surface already exists, glsurface_destroy() will be automatically called before re-initializing.
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// Returns whether or not the glsurface could be successfully initialized.
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bool glsurface_initialize(vec2_t inputBufferResolution);
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// Destroy an existing surface.
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void glsurface_destroy();
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// Sets the palette at paletteID to contain the byte buffer pointed to by pPalette.
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// If the surface is not initialized, the function returns immediately.
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void glsurface_setPalette(int32_t paletteID, void* pPalette);
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// Returns a pointer to the start of the surface's pixel buffer
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// Returns NULL if the surface is not initialized.
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void* glsurface_getBuffer();
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// Returns the resolution of the surface's buffer
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vec2_t glsurface_getBufferResolution();
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// Blit the surface's pixel buffer to the screen.
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// paletteID is the id of a palette previously set with glsurface_setPalette().
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// Renders as soon as the data has been uploaded.
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// If the surface is not initialized, the function returns immediately.
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void glsurface_blitBuffer(int32_t paletteID);
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#endif /* GLSURFACE_H_ */
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