obs-studio/libobs-opengl/gl-texture2d.c

250 lines
7.0 KiB
C

/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "gl-subsystem.h"
static bool upload_texture_2d(struct gs_texture_2d *tex, const uint8_t **data)
{
uint32_t row_size = tex->width * gs_get_format_bpp(tex->base.format);
uint32_t tex_size = tex->height * row_size / 8;
uint32_t num_levels = tex->base.levels;
bool compressed = gs_is_compressed_format(tex->base.format);
bool success;
if (!num_levels)
num_levels = gs_get_total_levels(tex->width, tex->height);
if (!gl_bind_texture(GL_TEXTURE_2D, tex->base.texture))
return false;
success = gl_init_face(GL_TEXTURE_2D, tex->base.gl_type, num_levels,
tex->base.gl_format, tex->base.gl_internal_format,
compressed, tex->width, tex->height, tex_size, &data);
if (!gl_tex_param_i(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, num_levels-1))
success = false;
if (!gl_bind_texture(GL_TEXTURE_2D, 0))
success = false;
return success;
}
static bool create_pixel_unpack_buffer(struct gs_texture_2d *tex)
{
GLsizeiptr size;
bool success = true;
if (!gl_gen_buffers(1, &tex->unpack_buffer))
return false;
if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex->unpack_buffer))
return false;
size = tex->width * gs_get_format_bpp(tex->base.format);
if (!gs_is_compressed_format(tex->base.format)) {
size /= 8;
size = (size+3) & 0xFFFFFFFC;
size *= tex->height;
} else {
size *= tex->height;
size /= 8;
}
glBufferData(GL_PIXEL_UNPACK_BUFFER, size, 0, GL_DYNAMIC_DRAW);
if (!gl_success("glBufferData"))
success = false;
if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0))
success = false;
return success;
}
gs_texture_t *device_texture_create(gs_device_t *device, uint32_t width,
uint32_t height, enum gs_color_format color_format,
uint32_t levels, const uint8_t **data, uint32_t flags)
{
struct gs_texture_2d *tex = bzalloc(sizeof(struct gs_texture_2d));
tex->base.device = device;
tex->base.type = GS_TEXTURE_2D;
tex->base.format = color_format;
tex->base.levels = levels;
tex->base.gl_format = convert_gs_format(color_format);
tex->base.gl_internal_format = convert_gs_internal_format(color_format);
tex->base.gl_type = get_gl_format_type(color_format);
tex->base.gl_target = GL_TEXTURE_2D;
tex->base.is_dynamic = (flags & GS_DYNAMIC) != 0;
tex->base.is_render_target = (flags & GS_RENDER_TARGET) != 0;
tex->base.is_dummy = (flags & GS_GL_DUMMYTEX) != 0;
tex->base.gen_mipmaps = (flags & GS_BUILD_MIPMAPS) != 0;
tex->width = width;
tex->height = height;
if (!gl_gen_textures(1, &tex->base.texture))
goto fail;
if (!tex->base.is_dummy) {
if (tex->base.is_dynamic && !create_pixel_unpack_buffer(tex))
goto fail;
if (!upload_texture_2d(tex, data))
goto fail;
}
return (gs_texture_t*)tex;
fail:
gs_texture_destroy((gs_texture_t*)tex);
blog(LOG_ERROR, "device_texture_create (GL) failed");
return NULL;
}
static inline bool is_texture_2d(const gs_texture_t *tex, const char *func)
{
bool is_tex2d = tex->type == GS_TEXTURE_2D;
if (!is_tex2d)
blog(LOG_ERROR, "%s (GL) failed: Not a 2D texture", func);
return is_tex2d;
}
void gs_texture_destroy(gs_texture_t *tex)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
if (!tex)
return;
if (!is_texture_2d(tex, "gs_texture_destroy"))
return;
if (tex->cur_sampler)
gs_samplerstate_destroy(tex->cur_sampler);
if (!tex->is_dummy && tex->is_dynamic && tex2d->unpack_buffer)
gl_delete_buffers(1, &tex2d->unpack_buffer);
if (tex->texture)
gl_delete_textures(1, &tex->texture);
bfree(tex);
}
uint32_t gs_texture_get_width(const gs_texture_t *tex)
{
const struct gs_texture_2d *tex2d = (const struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_get_width"))
return 0;
return tex2d->width;
}
uint32_t gs_texture_get_height(const gs_texture_t *tex)
{
const struct gs_texture_2d *tex2d = (const struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_get_height"))
return 0;
return tex2d->height;
}
enum gs_color_format gs_texture_get_color_format(const gs_texture_t *tex)
{
return tex->format;
}
bool gs_texture_map(gs_texture_t *tex, uint8_t **ptr, uint32_t *linesize)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_map"))
goto fail;
if (!tex2d->base.is_dynamic) {
blog(LOG_ERROR, "Texture is not dynamic");
goto fail;
}
if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex2d->unpack_buffer))
goto fail;
*ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
if (!gl_success("glMapBuffer"))
goto fail;
gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
*linesize = tex2d->width * gs_get_format_bpp(tex->format) / 8;
*linesize = (*linesize + 3) & 0xFFFFFFFC;
return true;
fail:
blog(LOG_ERROR, "gs_texture_map (GL) failed");
return false;
}
void gs_texture_unmap(gs_texture_t *tex)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_unmap"))
goto failed;
if (!gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, tex2d->unpack_buffer))
goto failed;
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
if (!gl_success("glUnmapBuffer"))
goto failed;
if (!gl_bind_texture(GL_TEXTURE_2D, tex2d->base.texture))
goto failed;
glTexImage2D(GL_TEXTURE_2D, 0, tex->gl_internal_format,
tex2d->width, tex2d->height, 0,
tex->gl_format, tex->gl_type, 0);
if (!gl_success("glTexImage2D"))
goto failed;
gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
gl_bind_texture(GL_TEXTURE_2D, 0);
return;
failed:
gl_bind_buffer(GL_PIXEL_UNPACK_BUFFER, 0);
gl_bind_texture(GL_TEXTURE_2D, 0);
blog(LOG_ERROR, "gs_texture_unmap (GL) failed");
}
bool gs_texture_is_rect(const gs_texture_t *tex)
{
const struct gs_texture_2d *tex2d = (const struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_unmap")) {
blog(LOG_ERROR, "gs_texture_is_rect (GL) failed");
return false;
}
return tex2d->base.gl_target == GL_TEXTURE_RECTANGLE;
}
void *gs_texture_get_obj(gs_texture_t *tex)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d*)tex;
if (!is_texture_2d(tex, "gs_texture_unmap")) {
blog(LOG_ERROR, "gs_texture_get_obj (GL) failed");
return NULL;
}
return &tex2d->base.texture;
}