wlroots-hyprland/render/gles2/texture.c

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#include <assert.h>
#include <drm_fourcc.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
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#include <stdint.h>
#include <stdlib.h>
#include <wayland-server-protocol.h>
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#include <wayland-util.h>
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#include <wlr/render/egl.h>
#include <wlr/render/interface.h>
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#include <wlr/render/wlr_texture.h>
#include <wlr/util/log.h>
#include "render/egl.h"
#include "render/gles2.h"
#include "render/pixel_format.h"
#include "types/wlr_buffer.h"
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static const struct wlr_texture_impl texture_impl;
bool wlr_texture_is_gles2(struct wlr_texture *wlr_texture) {
return wlr_texture->impl == &texture_impl;
}
struct wlr_gles2_texture *gles2_get_texture(
struct wlr_texture *wlr_texture) {
assert(wlr_texture_is_gles2(wlr_texture));
struct wlr_gles2_texture *texture = wl_container_of(wlr_texture, texture, wlr_texture);
return texture;
}
static bool gles2_texture_update_from_buffer(struct wlr_texture *wlr_texture,
struct wlr_buffer *buffer, const pixman_region32_t *damage) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
if (texture->drm_format == DRM_FORMAT_INVALID) {
return false;
}
void *data;
uint32_t format;
size_t stride;
if (!wlr_buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
return false;
}
if (format != texture->drm_format) {
wlr_buffer_end_data_ptr_access(buffer);
return false;
}
const struct wlr_gles2_pixel_format *fmt =
get_gles2_format_from_drm(texture->drm_format);
assert(fmt);
const struct wlr_pixel_format_info *drm_fmt =
drm_get_pixel_format_info(texture->drm_format);
assert(drm_fmt);
if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
wlr_buffer_end_data_ptr_access(buffer);
wlr_log(WLR_ERROR, "Cannot update texture: block formats are not supported");
return false;
}
if (!pixel_format_info_check_stride(drm_fmt, stride, buffer->width)) {
wlr_buffer_end_data_ptr_access(buffer);
return false;
}
struct wlr_egl_context prev_ctx;
wlr_egl_make_current(texture->renderer->egl, &prev_ctx);
push_gles2_debug(texture->renderer);
glBindTexture(GL_TEXTURE_2D, texture->tex);
int rects_len = 0;
const pixman_box32_t *rects = pixman_region32_rectangles(damage, &rects_len);
for (int i = 0; i < rects_len; i++) {
pixman_box32_t rect = rects[i];
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride / drm_fmt->bytes_per_block);
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, rect.x1);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, rect.y1);
int width = rect.x2 - rect.x1;
int height = rect.y2 - rect.y1;
glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x1, rect.y1, width, height,
fmt->gl_format, fmt->gl_type, data);
}
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glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0);
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glBindTexture(GL_TEXTURE_2D, 0);
pop_gles2_debug(texture->renderer);
wlr_egl_restore_context(&prev_ctx);
wlr_buffer_end_data_ptr_access(buffer);
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return true;
}
void gles2_texture_destroy(struct wlr_gles2_texture *texture) {
wl_list_remove(&texture->link);
if (texture->buffer != NULL) {
wlr_buffer_unlock(texture->buffer->buffer);
} else {
struct wlr_egl_context prev_ctx;
wlr_egl_make_current(texture->renderer->egl, &prev_ctx);
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push_gles2_debug(texture->renderer);
glDeleteTextures(1, &texture->tex);
glDeleteFramebuffers(1, &texture->fbo);
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pop_gles2_debug(texture->renderer);
wlr_egl_restore_context(&prev_ctx);
}
free(texture);
}
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static void handle_gles2_texture_destroy(struct wlr_texture *wlr_texture) {
gles2_texture_destroy(gles2_get_texture(wlr_texture));
}
static bool gles2_texture_bind(struct wlr_gles2_texture *texture) {
if (texture->fbo) {
glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
} else if (texture->buffer) {
if (texture->buffer->external_only) {
return false;
}
GLuint fbo = gles2_buffer_get_fbo(texture->buffer);
if (!fbo) {
return false;
}
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
} else {
glGenFramebuffers(1, &texture->fbo);
glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
texture->target, texture->tex, 0);
GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
wlr_log(WLR_ERROR, "Failed to create FBO");
glDeleteFramebuffers(1, &texture->fbo);
texture->fbo = 0;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
return false;
}
}
return true;
}
static bool gles2_texture_read_pixels(struct wlr_texture *wlr_texture,
const struct wlr_texture_read_pixels_options *options) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
struct wlr_box src;
wlr_texture_read_pixels_options_get_src_box(options, wlr_texture, &src);
const struct wlr_gles2_pixel_format *fmt =
get_gles2_format_from_drm(options->format);
if (fmt == NULL || !is_gles2_pixel_format_supported(texture->renderer, fmt)) {
wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format 0x%"PRIX32, options->format);
return false;
}
if (fmt->gl_format == GL_BGRA_EXT && !texture->renderer->exts.EXT_read_format_bgra) {
wlr_log(WLR_ERROR,
"Cannot read pixels: missing GL_EXT_read_format_bgra extension");
return false;
}
const struct wlr_pixel_format_info *drm_fmt =
drm_get_pixel_format_info(fmt->drm_format);
assert(drm_fmt);
if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
wlr_log(WLR_ERROR, "Cannot read pixels: block formats are not supported");
return false;
}
push_gles2_debug(texture->renderer);
struct wlr_egl_context prev_ctx;
if (!wlr_egl_make_current(texture->renderer->egl, &prev_ctx)) {
return false;
}
if (!gles2_texture_bind(texture)) {
return false;
}
// Make sure any pending drawing is finished before we try to read it
glFinish();
glGetError(); // Clear the error flag
unsigned char *p = wlr_texture_read_pixel_options_get_data(options);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
uint32_t pack_stride = pixel_format_info_min_stride(drm_fmt, src.width);
if (pack_stride == options->stride && options->dst_x == 0) {
// Under these particular conditions, we can read the pixels with only
// one glReadPixels call
glReadPixels(src.x, src.y, src.width, src.height, fmt->gl_format, fmt->gl_type, p);
} else {
// Unfortunately GLES2 doesn't support GL_PACK_ROW_LENGTH, so we have to read
// the lines out row by row
for (int32_t i = 0; i < src.height; ++i) {
uint32_t y = src.y + i;
glReadPixels(src.x, y, src.width, 1, fmt->gl_format,
fmt->gl_type, p + i * options->stride);
}
}
wlr_egl_restore_context(&prev_ctx);
pop_gles2_debug(texture->renderer);
return glGetError() == GL_NO_ERROR;
}
static uint32_t gles2_texture_preferred_read_format(struct wlr_texture *wlr_texture) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
push_gles2_debug(texture->renderer);
uint32_t fmt = DRM_FORMAT_INVALID;
struct wlr_egl_context prev_ctx;
if (!wlr_egl_make_current(texture->renderer->egl, &prev_ctx)) {
return fmt;
}
if (!gles2_texture_bind(texture)) {
goto out;
}
GLint gl_format = -1, gl_type = -1, alpha_size = -1;
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT, &gl_format);
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE, &gl_type);
glGetIntegerv(GL_ALPHA_BITS, &alpha_size);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
pop_gles2_debug(texture->renderer);
const struct wlr_gles2_pixel_format *pix_fmt =
get_gles2_format_from_gl(gl_format, gl_type, alpha_size > 0);
if (pix_fmt != NULL) {
fmt = pix_fmt->drm_format;
goto out;
}
if (texture->renderer->exts.EXT_read_format_bgra) {
fmt = DRM_FORMAT_XRGB8888;
goto out;
}
out:
wlr_egl_restore_context(&prev_ctx);
return fmt;
}
static const struct wlr_texture_impl texture_impl = {
.update_from_buffer = gles2_texture_update_from_buffer,
.read_pixels = gles2_texture_read_pixels,
.preferred_read_format = gles2_texture_preferred_read_format,
.destroy = handle_gles2_texture_destroy,
};
static struct wlr_gles2_texture *gles2_texture_create(
struct wlr_gles2_renderer *renderer, uint32_t width, uint32_t height) {
struct wlr_gles2_texture *texture = calloc(1, sizeof(*texture));
if (texture == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return NULL;
}
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wlr_texture_init(&texture->wlr_texture, &renderer->wlr_renderer,
&texture_impl, width, height);
texture->renderer = renderer;
wl_list_insert(&renderer->textures, &texture->link);
return texture;
}
static struct wlr_texture *gles2_texture_from_pixels(
struct wlr_renderer *wlr_renderer,
uint32_t drm_format, uint32_t stride, uint32_t width,
uint32_t height, const void *data) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
const struct wlr_gles2_pixel_format *fmt =
get_gles2_format_from_drm(drm_format);
if (fmt == NULL) {
wlr_log(WLR_ERROR, "Unsupported pixel format 0x%"PRIX32, drm_format);
return NULL;
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}
const struct wlr_pixel_format_info *drm_fmt =
drm_get_pixel_format_info(drm_format);
assert(drm_fmt);
if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
wlr_log(WLR_ERROR, "Cannot upload texture: block formats are not supported");
return NULL;
}
if (!pixel_format_info_check_stride(drm_fmt, stride, width)) {
return NULL;
}
struct wlr_gles2_texture *texture =
gles2_texture_create(renderer, width, height);
if (texture == NULL) {
return NULL;
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}
texture->target = GL_TEXTURE_2D;
texture->has_alpha = pixel_format_has_alpha(fmt->drm_format);
texture->drm_format = fmt->drm_format;
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GLint internal_format = fmt->gl_internalformat;
if (!internal_format) {
internal_format = fmt->gl_format;
}
struct wlr_egl_context prev_ctx;
wlr_egl_make_current(renderer->egl, &prev_ctx);
push_gles2_debug(renderer);
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glGenTextures(1, &texture->tex);
glBindTexture(GL_TEXTURE_2D, texture->tex);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride / drm_fmt->bytes_per_block);
glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0,
fmt->gl_format, fmt->gl_type, data);
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
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glBindTexture(GL_TEXTURE_2D, 0);
pop_gles2_debug(renderer);
wlr_egl_restore_context(&prev_ctx);
return &texture->wlr_texture;
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}
static struct wlr_texture *gles2_texture_from_dmabuf(
struct wlr_gles2_renderer *renderer, struct wlr_buffer *wlr_buffer,
struct wlr_dmabuf_attributes *attribs) {
if (!renderer->procs.glEGLImageTargetTexture2DOES) {
return NULL;
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}
struct wlr_gles2_buffer *buffer = gles2_buffer_get_or_create(renderer, wlr_buffer);
if (!buffer) {
return NULL;
}
struct wlr_gles2_texture *texture =
gles2_texture_create(renderer, attribs->width, attribs->height);
if (texture == NULL) {
return NULL;
}
texture->target = buffer->external_only ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
texture->buffer = buffer;
texture->drm_format = DRM_FORMAT_INVALID; // texture can't be written anyways
texture->has_alpha = pixel_format_has_alpha(attribs->format);
struct wlr_egl_context prev_ctx;
wlr_egl_make_current(renderer->egl, &prev_ctx);
push_gles2_debug(texture->renderer);
bool invalid;
if (!buffer->tex) {
glGenTextures(1, &buffer->tex);
invalid = true;
} else {
// External changes are immediately made visible by the GL implementation
invalid = !buffer->external_only;
}
if (invalid) {
glBindTexture(texture->target, buffer->tex);
glTexParameteri(texture->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(texture->target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
renderer->procs.glEGLImageTargetTexture2DOES(texture->target, buffer->image);
glBindTexture(texture->target, 0);
}
pop_gles2_debug(texture->renderer);
wlr_egl_restore_context(&prev_ctx);
texture->tex = buffer->tex;
wlr_buffer_lock(texture->buffer->buffer);
return &texture->wlr_texture;
}
struct wlr_texture *gles2_texture_from_buffer(struct wlr_renderer *wlr_renderer,
struct wlr_buffer *buffer) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
void *data;
uint32_t format;
size_t stride;
struct wlr_dmabuf_attributes dmabuf;
if (wlr_buffer_get_dmabuf(buffer, &dmabuf)) {
return gles2_texture_from_dmabuf(renderer, buffer, &dmabuf);
} else if (wlr_buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
struct wlr_texture *tex = gles2_texture_from_pixels(wlr_renderer,
format, stride, buffer->width, buffer->height, data);
wlr_buffer_end_data_ptr_access(buffer);
return tex;
} else {
return NULL;
}
}
void wlr_gles2_texture_get_attribs(struct wlr_texture *wlr_texture,
struct wlr_gles2_texture_attribs *attribs) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
*attribs = (struct wlr_gles2_texture_attribs){
.target = texture->target,
.tex = texture->tex,
.has_alpha = texture->has_alpha,
};
}