Dominic Masters
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92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/**
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* Copyright (c) 2026 Dominic Masters
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*/
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#include "display/texture/texture.h"
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#include "assert/assert.h"
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#include "error/errorgl.h"
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#include "util/memory.h"
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errorret_t textureInitGL(
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texturegl_t *texture,
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const int32_t width,
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const int32_t height,
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const textureformatgl_t format,
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const texturedata_t data
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) {
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glGenTextures(1, &texture->id);
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errorChain(errorGLCheck());
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glBindTexture(GL_TEXTURE_2D, texture->id);
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errorChain(errorGLCheck());
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switch(format) {
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case TEXTURE_FORMAT_RGBA:
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glTexImage2D(
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GL_TEXTURE_2D, 0, format, width, height, 0,
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format, GL_UNSIGNED_BYTE, (void*)data.rgbaColors
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);
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errorChain(errorGLCheck());
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break;
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case TEXTURE_FORMAT_PALETTE:
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texture->palette = data.paletted.palette;
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#ifdef DUSK_OPENGL_LEGACY
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glTexImage2D(
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GL_TEXTURE_2D,
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0, GL_COLOR_INDEX8_EXT,
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width, height,
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0, GL_COLOR_INDEX8_EXT,
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GL_UNSIGNED_BYTE, (void*)data.paletted.indices
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);
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glColorTableEXT(
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GL_TEXTURE_2D, GL_RGBA, texture->palette->count, GL_RGBA,
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GL_UNSIGNED_BYTE, (const void*)texture->palette->colors
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);
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errorChain(errorGLCheck());
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#else
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// For modern systems we send to only the R channel and the shader does
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// the rest.
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glTexImage2D(
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GL_TEXTURE_2D, 0, GL_RED, width, height, 0,
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GL_RED, GL_UNSIGNED_BYTE, (void*)data.paletted.indices
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);
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errorChain(errorGLCheck());
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#endif
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break;
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default:
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assertUnreachable("Unknown texture format");
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break;
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}
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errorChain(errorGLCheck());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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errorChain(errorGLCheck());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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errorChain(errorGLCheck());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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errorChain(errorGLCheck());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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errorChain(errorGLCheck());
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glBindTexture(GL_TEXTURE_2D, 0);
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errorChain(errorGLCheck());
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errorOk();
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}
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errorret_t textureDisposeGL(texturegl_t *texture) {
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assertNotNull(texture, "Texture cannot be NULL");
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assertTrue(texture->id != 0, "Texture ID must be valid");
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glDeleteTextures(1, &texture->id);
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errorChain(errorGLCheck());
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errorOk();
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} |