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#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <wayland-util.h>
#include <wayland-server-protocol.h>
#include <wlr/render.h>
#include <wlr/render/interface.h>
#include <wlr/render/matrix.h>
#include <wlr/util/log.h>
#include "render/gles2.h"
static bool gles2_texture_upload_pixels(struct wlr_texture_state *texture,
enum wl_shm_format format, int stride, int width, int height,
const unsigned char *pixels) {
assert(texture);
const struct pixel_format *fmt = gl_format_for_wl_format(format);
if (!fmt || !fmt->gl_format) {
wlr_log(L_ERROR, "No supported pixel format for this texture");
return false;
}
texture->wlr_texture->width = width;
texture->wlr_texture->height = height;
texture->wlr_texture->format = format;
texture->pixel_format = fmt;
GL_CALL(glGenTextures(1, &texture->tex_id));
GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride));
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
fmt->gl_format, fmt->gl_type, pixels));
texture->wlr_texture->valid = true;
return true;
}
static bool gles2_texture_update_pixels(struct wlr_texture_state *texture,
enum wl_shm_format format, int stride, int x, int y,
int width, int height, const unsigned char *pixels) {
assert(texture && texture->wlr_texture->valid);
// TODO: Test if the unpack subimage extension is supported and adjust the
// upload strategy if not
if (texture->wlr_texture->format != format) {
return gles2_texture_upload_pixels(texture, format, stride,
width, height, pixels);
}
const struct pixel_format *fmt = texture->pixel_format;
GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, x));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, y));
GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
fmt->gl_format, fmt->gl_type, pixels));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0));
return true;
}
static bool gles2_texture_upload_shm(struct wlr_texture_state *texture,
uint32_t format, struct wl_shm_buffer *buffer) {
const struct pixel_format *fmt = gl_format_for_wl_format(format);
if (!fmt || !fmt->gl_format) {
wlr_log(L_ERROR, "No supported pixel format for this texture");
return false;
}
wl_shm_buffer_begin_access(buffer);
uint8_t *pixels = wl_shm_buffer_get_data(buffer);
int width = wl_shm_buffer_get_width(buffer);
int height = wl_shm_buffer_get_height(buffer);
int pitch = wl_shm_buffer_get_stride(buffer) / (fmt->bpp / 8);
texture->wlr_texture->width = width;
texture->wlr_texture->height = height;
texture->wlr_texture->format = format;
texture->pixel_format = fmt;
GL_CALL(glGenTextures(1, &texture->tex_id));
GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, pitch));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0));
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
fmt->gl_format, fmt->gl_type, pixels));
texture->wlr_texture->valid = true;
wl_shm_buffer_end_access(buffer);
return true;
}
static bool gles2_texture_update_shm(struct wlr_texture_state *texture,
uint32_t format, int x, int y, int width, int height,
struct wl_shm_buffer *buffer) {
// TODO: Test if the unpack subimage extension is supported and adjust the
// upload strategy if not
assert(texture && texture->wlr_texture->valid);
if (texture->wlr_texture->format != format) {
return gles2_texture_upload_shm(texture, format, buffer);
}
const struct pixel_format *fmt = texture->pixel_format;
wl_shm_buffer_begin_access(buffer);
uint8_t *pixels = wl_shm_buffer_get_data(buffer);
int pitch = wl_shm_buffer_get_stride(buffer) / (fmt->bpp / 8);
GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, pitch));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, x));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, y));
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
fmt->gl_format, fmt->gl_type, pixels));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0));
GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0));
wl_shm_buffer_end_access(buffer);
return true;
}
static void gles2_texture_get_matrix(struct wlr_texture_state *texture,
float (*matrix)[16], const float (*projection)[16], int x, int y) {
struct wlr_texture *_texture = texture->wlr_texture;
float world[16];
wlr_matrix_identity(matrix);
wlr_matrix_translate(&world, x, y, 0);
wlr_matrix_mul(matrix, &world, matrix);
wlr_matrix_scale(&world, _texture->width, _texture->height, 1);
wlr_matrix_mul(matrix, &world, matrix);
wlr_matrix_mul(projection, matrix, matrix);
}
static void gles2_texture_bind(struct wlr_texture_state *texture) {
GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GL_CALL(glUseProgram(*texture->pixel_format->shader));
}
static void gles2_texture_destroy(struct wlr_texture_state *texture) {
wl_signal_emit(&texture->wlr_texture->destroy_signal, texture->wlr_texture);
GL_CALL(glDeleteTextures(1, &texture->tex_id));
free(texture);
}
static struct wlr_texture_impl wlr_texture_impl = {
.upload_pixels = gles2_texture_upload_pixels,
.update_pixels = gles2_texture_update_pixels,
.upload_shm = gles2_texture_upload_shm,
.update_shm = gles2_texture_update_shm,
.get_matrix = gles2_texture_get_matrix,
.bind = gles2_texture_bind,
.destroy = gles2_texture_destroy,
};
struct wlr_texture *gles2_texture_init() {
struct wlr_texture_state *state = calloc(sizeof(struct wlr_texture_state), 1);
struct wlr_texture *texture = wlr_texture_init(state, &wlr_texture_impl);
state->wlr_texture = texture;
wl_signal_init(&texture->destroy_signal);
return texture;
}
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