41fad2d1a4
This Fixes a minor flaw with the API where data had to always be mutable to be usable by the API. Functions that do not modify the fundamental underlying data of a structure should be marked as constant, both for safety and to signify that the parameter is input only and will not be modified by the function using it.
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include "gl-subsystem.h"
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static inline bool upload_texture_cube(struct gs_texture_cube *tex,
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const uint8_t **data)
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{
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uint32_t row_size = tex->size * gs_get_format_bpp(tex->base.format);
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uint32_t tex_size = tex->size * row_size / 8;
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uint32_t num_levels = tex->base.levels;
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bool compressed = gs_is_compressed_format(tex->base.format);
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GLenum gl_type = get_gl_format_type(tex->base.format);
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bool success = true;
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uint32_t i;
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if (!num_levels)
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num_levels = gs_get_total_levels(tex->size, tex->size);
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for (i = 0; i < 6; i++) {
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GLenum target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + i;
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if (!gl_bind_texture(target, tex->base.texture))
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success = false;
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if (!gl_init_face(target, gl_type, num_levels,
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tex->base.gl_format,
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tex->base.gl_internal_format,
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compressed, tex->size, tex->size,
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tex_size, &data))
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success = false;
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if (!gl_bind_texture(target, 0))
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success = false;
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if (data)
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data++;
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}
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAX_LEVEL, num_levels);
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if (!gl_success("glTexParameteri"))
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success = false;
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return success;
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}
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gs_texture_t *device_cubetexture_create(gs_device_t *device, uint32_t size,
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enum gs_color_format color_format, uint32_t levels,
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const uint8_t **data, uint32_t flags)
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{
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struct gs_texture_cube *tex = bzalloc(sizeof(struct gs_texture_cube));
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tex->base.device = device;
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tex->base.type = GS_TEXTURE_CUBE;
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tex->base.format = color_format;
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tex->base.levels = levels;
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tex->base.gl_format = convert_gs_format(color_format);
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tex->base.gl_internal_format = convert_gs_internal_format(color_format);
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tex->base.gl_target = GL_TEXTURE_CUBE_MAP;
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tex->base.is_render_target = (flags & GS_RENDER_TARGET) != 0;
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tex->base.gen_mipmaps = (flags & GS_BUILD_MIPMAPS) != 0;
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tex->size = size;
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if (!gl_gen_textures(1, &tex->base.texture))
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goto fail;
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if (!upload_texture_cube(tex, data))
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goto fail;
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return (gs_texture_t*)tex;
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fail:
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gs_cubetexture_destroy((gs_texture_t*)tex);
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blog(LOG_ERROR, "device_cubetexture_create (GL) failed");
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return NULL;
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}
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void gs_cubetexture_destroy(gs_texture_t *tex)
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{
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if (!tex)
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return;
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if (tex->texture) {
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glDeleteTextures(1, &tex->texture);
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gl_success("glDeleteTextures");
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}
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bfree(tex);
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}
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static inline bool is_texture_cube(const gs_texture_t *tex, const char *func)
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{
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bool is_texcube = tex->type == GS_TEXTURE_CUBE;
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if (!is_texcube)
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blog(LOG_ERROR, "%s (GL) failed: Not a cubemap texture", func);
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return is_texcube;
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}
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uint32_t gs_cubetexture_get_size(const gs_texture_t *cubetex)
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{
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const struct gs_texture_cube *cube =
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(const struct gs_texture_cube*)cubetex;
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if (!is_texture_cube(cubetex, "gs_cubetexture_get_size"))
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return 0;
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return cube->size;
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}
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enum gs_color_format gs_cubetexture_get_color_format(
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const gs_texture_t *cubetex)
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{
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return cubetex->format;
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}
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