c9df41c1e2
Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
250 lines
6.9 KiB
C
250 lines
6.9 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 bool upload_texture_2d(struct gs_texture_2d *tex, const uint8_t **data)
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{
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uint32_t row_size = tex->width * gs_get_format_bpp(tex->base.format);
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uint32_t tex_size = tex->height * 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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bool success;
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if (!num_levels)
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num_levels = gs_get_total_levels(tex->width, tex->height);
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if (!gl_bind_texture(GL_TEXTURE_2D, tex->base.texture))
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return false;
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success = gl_init_face(GL_TEXTURE_2D, tex->base.gl_type, num_levels,
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tex->base.gl_format, tex->base.gl_internal_format,
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compressed, tex->width, tex->height, tex_size, &data);
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if (!gl_tex_param_i(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, num_levels-1))
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success = false;
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if (!gl_bind_texture(GL_TEXTURE_2D, 0))
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success = false;
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return success;
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}
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static bool create_pixel_unpack_buffer(struct gs_texture_2d *tex)
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{
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GLsizeiptr size;
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bool success = true;
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if (!gl_gen_buffers(1, &tex->unpack_buffer))
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return false;
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if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex->unpack_buffer))
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return false;
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size = tex->width * gs_get_format_bpp(tex->base.format);
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if (!gs_is_compressed_format(tex->base.format)) {
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size /= 8;
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size = (size+3) & 0xFFFFFFFC;
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size *= tex->height;
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} else {
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size *= tex->height;
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size /= 8;
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}
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glBufferData(GL_PIXEL_UNPACK_BUFFER, size, 0, GL_DYNAMIC_DRAW);
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if (!gl_success("glBufferData"))
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success = false;
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if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0))
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success = false;
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return success;
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}
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gs_texture_t *device_texture_create(gs_device_t *device, uint32_t width,
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uint32_t height, enum gs_color_format color_format,
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uint32_t levels, const uint8_t **data, uint32_t flags)
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{
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struct gs_texture_2d *tex = bzalloc(sizeof(struct gs_texture_2d));
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tex->base.device = device;
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tex->base.type = GS_TEXTURE_2D;
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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_type = get_gl_format_type(color_format);
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tex->base.gl_target = GL_TEXTURE_2D;
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tex->base.is_dynamic = (flags & GS_DYNAMIC) != 0;
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tex->base.is_render_target = (flags & GS_RENDER_TARGET) != 0;
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tex->base.is_dummy = (flags & GS_GL_DUMMYTEX) != 0;
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tex->base.gen_mipmaps = (flags & GS_BUILD_MIPMAPS) != 0;
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tex->width = width;
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tex->height = height;
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if (!gl_gen_textures(1, &tex->base.texture))
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goto fail;
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if (!tex->base.is_dummy) {
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if (tex->base.is_dynamic && !create_pixel_unpack_buffer(tex))
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goto fail;
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if (!upload_texture_2d(tex, data))
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goto fail;
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}
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return (gs_texture_t*)tex;
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fail:
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gs_texture_destroy((gs_texture_t*)tex);
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blog(LOG_ERROR, "device_texture_create (GL) failed");
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return NULL;
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}
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static inline bool is_texture_2d(gs_texture_t *tex, const char *func)
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{
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bool is_tex2d = tex->type == GS_TEXTURE_2D;
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if (!is_tex2d)
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blog(LOG_ERROR, "%s (GL) failed: Not a 2D texture", func);
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return is_tex2d;
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}
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void gs_texture_destroy(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!tex)
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return;
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if (!is_texture_2d(tex, "gs_texture_destroy"))
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return;
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if (tex->cur_sampler)
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gs_samplerstate_destroy(tex->cur_sampler);
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if (!tex->is_dummy && tex->is_dynamic && tex2d->unpack_buffer)
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gl_delete_buffers(1, &tex2d->unpack_buffer);
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if (tex->texture)
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gl_delete_textures(1, &tex->texture);
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bfree(tex);
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}
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uint32_t gs_texture_get_width(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_get_width"))
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return 0;
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return tex2d->width;
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}
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uint32_t gs_texture_get_height(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_get_height"))
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return 0;
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return tex2d->height;
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}
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enum gs_color_format gs_texture_get_color_format(gs_texture_t *tex)
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{
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return tex->format;
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}
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bool gs_texture_map(gs_texture_t *tex, uint8_t **ptr, uint32_t *linesize)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_map"))
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goto fail;
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if (!tex2d->base.is_dynamic) {
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blog(LOG_ERROR, "Texture is not dynamic");
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goto fail;
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}
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if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex2d->unpack_buffer))
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goto fail;
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*ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
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if (!gl_success("glMapBuffer"))
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goto fail;
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gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
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*linesize = tex2d->width * gs_get_format_bpp(tex->format) / 8;
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*linesize = (*linesize + 3) & 0xFFFFFFFC;
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return true;
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fail:
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blog(LOG_ERROR, "gs_texture_map (GL) failed");
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return false;
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}
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void gs_texture_unmap(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_unmap"))
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goto failed;
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if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex2d->unpack_buffer))
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goto failed;
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glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
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if (!gl_success("glUnmapBuffer"))
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goto failed;
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if (!gl_bind_texture(GL_TEXTURE_2D, tex2d->base.texture))
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goto failed;
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glTexImage2D(GL_TEXTURE_2D, 0, tex->gl_internal_format,
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tex2d->width, tex2d->height, 0,
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tex->gl_format, tex->gl_type, 0);
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if (!gl_success("glTexImage2D"))
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goto failed;
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gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
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gl_bind_texture(GL_TEXTURE_2D, 0);
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return;
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failed:
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gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
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gl_bind_texture(GL_TEXTURE_2D, 0);
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blog(LOG_ERROR, "gs_texture_unmap (GL) failed");
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}
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bool gs_texture_is_rect(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_unmap")) {
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blog(LOG_ERROR, "gs_texture_is_rect (GL) failed");
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return false;
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}
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return tex2d->base.gl_target == GL_TEXTURE_RECTANGLE;
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}
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void *gs_texture_get_obj(gs_texture_t *tex)
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{
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struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
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if (!is_texture_2d(tex, "gs_texture_unmap")) {
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blog(LOG_ERROR, "gs_texture_get_obj (GL) failed");
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return NULL;
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}
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return &tex2d->base.texture;
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}
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