wlroots/render/gles2/renderer.c

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#include <assert.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <stdint.h>
#include <stdio.h>
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#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>
#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_matrix.h>
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#include <wlr/util/log.h>
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#include "glapi.h"
#include "render/gles2.h"
static const struct wlr_renderer_impl renderer_impl;
static struct wlr_gles2_renderer *gles2_get_renderer(
struct wlr_renderer *wlr_renderer) {
assert(wlr_renderer->impl == &renderer_impl);
return (struct wlr_gles2_renderer *)wlr_renderer;
}
static struct wlr_gles2_renderer *gles2_get_renderer_in_context(
struct wlr_renderer *wlr_renderer) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
assert(wlr_egl_is_current(renderer->egl));
return renderer;
}
static void gles2_begin(struct wlr_renderer *wlr_renderer, uint32_t width,
uint32_t height) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
PUSH_GLES2_DEBUG;
glViewport(0, 0, width, height);
renderer->viewport_width = width;
renderer->viewport_height = height;
// enable transparency
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
// XXX: maybe we should save output projection and remove some of the need
// for users to sling matricies themselves
POP_GLES2_DEBUG;
}
static void gles2_end(struct wlr_renderer *wlr_renderer) {
gles2_get_renderer_in_context(wlr_renderer);
// no-op
}
static void gles2_clear(struct wlr_renderer *wlr_renderer,
const float color[static 4]) {
gles2_get_renderer_in_context(wlr_renderer);
PUSH_GLES2_DEBUG;
glClearColor(color[0], color[1], color[2], color[3]);
glClear(GL_COLOR_BUFFER_BIT);
POP_GLES2_DEBUG;
}
static void gles2_scissor(struct wlr_renderer *wlr_renderer,
struct wlr_box *box) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
PUSH_GLES2_DEBUG;
if (box != NULL) {
struct wlr_box gl_box;
wlr_box_transform(&gl_box, box, WL_OUTPUT_TRANSFORM_FLIPPED_180,
renderer->viewport_width, renderer->viewport_height);
glScissor(gl_box.x, gl_box.y, gl_box.width, gl_box.height);
glEnable(GL_SCISSOR_TEST);
} else {
glDisable(GL_SCISSOR_TEST);
}
POP_GLES2_DEBUG;
}
static void draw_quad(void) {
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GLfloat verts[] = {
1, 0, // top right
0, 0, // top left
1, 1, // bottom right
0, 1, // bottom left
};
GLfloat texcoord[] = {
1, 0, // top right
0, 0, // top left
1, 1, // bottom right
0, 1, // bottom left
};
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, verts);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, texcoord);
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glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
}
static bool gles2_render_texture_with_matrix(struct wlr_renderer *wlr_renderer,
struct wlr_texture *wlr_texture, const float matrix[static 9],
float alpha) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
struct wlr_gles2_texture *texture =
gles2_get_texture(wlr_texture);
struct wlr_gles2_tex_shader *shader = NULL;
switch (texture->target) {
case GL_TEXTURE_2D:
if (texture->has_alpha) {
shader = &renderer->shaders.tex_rgba;
} else {
shader = &renderer->shaders.tex_rgbx;
}
break;
case GL_TEXTURE_EXTERNAL_OES:
shader = &renderer->shaders.tex_ext;
if (!renderer->exts.egl_image_external_oes) {
wlr_log(WLR_ERROR, "Failed to render texture: "
"GL_TEXTURE_EXTERNAL_OES not supported");
return false;
}
break;
default:
abort();
}
// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
// to GL_FALSE
float transposition[9];
wlr_matrix_transpose(transposition, matrix);
PUSH_GLES2_DEBUG;
glActiveTexture(GL_TEXTURE0);
glBindTexture(texture->target, texture->tex);
glTexParameteri(texture->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(texture->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glUseProgram(shader->program);
glUniformMatrix3fv(shader->proj, 1, GL_FALSE, transposition);
glUniform1i(shader->invert_y, texture->inverted_y);
glUniform1i(shader->tex, 0);
glUniform1f(shader->alpha, alpha);
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draw_quad();
POP_GLES2_DEBUG;
return true;
}
static void gles2_render_quad_with_matrix(struct wlr_renderer *wlr_renderer,
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const float color[static 4], const float matrix[static 9]) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
// to GL_FALSE
float transposition[9];
wlr_matrix_transpose(transposition, matrix);
PUSH_GLES2_DEBUG;
glUseProgram(renderer->shaders.quad.program);
glUniformMatrix3fv(renderer->shaders.quad.proj, 1, GL_FALSE, transposition);
glUniform4f(renderer->shaders.quad.color, color[0], color[1], color[2], color[3]);
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draw_quad();
POP_GLES2_DEBUG;
}
static void gles2_render_ellipse_with_matrix(struct wlr_renderer *wlr_renderer,
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const float color[static 4], const float matrix[static 9]) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
// to GL_FALSE
float transposition[9];
wlr_matrix_transpose(transposition, matrix);
PUSH_GLES2_DEBUG;
glUseProgram(renderer->shaders.ellipse.program);
glUniformMatrix3fv(renderer->shaders.ellipse.proj, 1, GL_FALSE, transposition);
glUniform4f(renderer->shaders.ellipse.color, color[0], color[1], color[2], color[3]);
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draw_quad();
POP_GLES2_DEBUG;
}
static const enum wl_shm_format *gles2_renderer_formats(
struct wlr_renderer *wlr_renderer, size_t *len) {
return get_gles2_wl_formats(len);
}
static bool gles2_format_supported(struct wlr_renderer *wlr_renderer,
enum wl_shm_format wl_fmt) {
return get_gles2_format_from_wl(wl_fmt) != NULL;
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}
static bool gles2_resource_is_wl_drm_buffer(struct wlr_renderer *wlr_renderer,
struct wl_resource *resource) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
if (!eglQueryWaylandBufferWL) {
return false;
}
EGLint fmt;
return eglQueryWaylandBufferWL(renderer->egl->display, resource,
EGL_TEXTURE_FORMAT, &fmt);
}
static void gles2_wl_drm_buffer_get_size(struct wlr_renderer *wlr_renderer,
struct wl_resource *buffer, int *width, int *height) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer(wlr_renderer);
if (!eglQueryWaylandBufferWL) {
return;
}
eglQueryWaylandBufferWL(renderer->egl->display, buffer, EGL_WIDTH, width);
eglQueryWaylandBufferWL(renderer->egl->display, buffer, EGL_HEIGHT, height);
}
static const struct wlr_drm_format_set *gles2_get_dmabuf_formats(
struct wlr_renderer *wlr_renderer) {
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struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
return wlr_egl_get_dmabuf_formats(renderer->egl);
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}
static enum wl_shm_format gles2_preferred_read_format(
struct wlr_renderer *wlr_renderer) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
GLint gl_format = -1, gl_type = -1;
PUSH_GLES2_DEBUG;
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT, &gl_format);
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE, &gl_type);
POP_GLES2_DEBUG;
EGLint alpha_size = -1;
eglGetConfigAttrib(renderer->egl->display, renderer->egl->config,
EGL_ALPHA_SIZE, &alpha_size);
const struct wlr_gles2_pixel_format *fmt =
get_gles2_format_from_gl(gl_format, gl_type, alpha_size > 0);
if (fmt != NULL) {
return fmt->wl_format;
}
if (renderer->exts.read_format_bgra_ext) {
return WL_SHM_FORMAT_XRGB8888;
}
return WL_SHM_FORMAT_XBGR8888;
}
static bool gles2_read_pixels(struct wlr_renderer *wlr_renderer,
enum wl_shm_format wl_fmt, uint32_t *flags, uint32_t stride,
uint32_t width, uint32_t height, uint32_t src_x, uint32_t src_y,
uint32_t dst_x, uint32_t dst_y, void *data) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
const struct wlr_gles2_pixel_format *fmt = get_gles2_format_from_wl(wl_fmt);
if (fmt == NULL) {
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wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format");
return false;
}
if (fmt->gl_format == GL_BGRA_EXT && !renderer->exts.read_format_bgra_ext) {
wlr_log(WLR_ERROR,
"Cannot read pixels: missing GL_EXT_read_format_bgra extension");
return false;
}
PUSH_GLES2_DEBUG;
// Make sure any pending drawing is finished before we try to read it
glFinish();
glGetError(); // Clear the error flag
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unsigned char *p = (unsigned char *)data + dst_y * stride;
uint32_t pack_stride = width * fmt->bpp / 8;
if (pack_stride == stride && dst_x == 0 && flags != NULL) {
// Under these particular conditions, we can read the pixels with only
// one glReadPixels call
glReadPixels(src_x, renderer->viewport_height - height - src_y,
width, height, fmt->gl_format, fmt->gl_type, p);
*flags = WLR_RENDERER_READ_PIXELS_Y_INVERT;
} else {
// Unfortunately GLES2 doesn't support GL_PACK_*, so we have to read
// the lines out row by row
for (size_t i = 0; i < height; ++i) {
glReadPixels(src_x, renderer->viewport_height - src_y - i - 1, width, 1, fmt->gl_format,
fmt->gl_type, p + i * stride + dst_x * fmt->bpp / 8);
}
if (flags != NULL) {
*flags = 0;
}
}
POP_GLES2_DEBUG;
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return glGetError() == GL_NO_ERROR;
}
static struct wlr_texture *gles2_texture_from_pixels(
struct wlr_renderer *wlr_renderer, enum wl_shm_format wl_fmt,
uint32_t stride, uint32_t width, uint32_t height, const void *data) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
return wlr_gles2_texture_from_pixels(renderer->egl, wl_fmt, stride, width,
height, data);
}
static struct wlr_texture *gles2_texture_from_wl_drm(
struct wlr_renderer *wlr_renderer, struct wl_resource *data) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
return wlr_gles2_texture_from_wl_drm(renderer->egl, data);
}
static struct wlr_texture *gles2_texture_from_dmabuf(
struct wlr_renderer *wlr_renderer,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
return wlr_gles2_texture_from_dmabuf(renderer->egl, attribs);
}
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static void gles2_init_wl_display(struct wlr_renderer *wlr_renderer,
struct wl_display *wl_display) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer(wlr_renderer);
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if (!wlr_egl_bind_display(renderer->egl, wl_display)) {
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wlr_log(WLR_INFO, "failed to bind wl_display to EGL");
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}
}
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struct wlr_egl *wlr_gles2_renderer_get_egl(struct wlr_renderer *wlr_renderer) {
struct wlr_gles2_renderer *renderer =
gles2_get_renderer(wlr_renderer);
return renderer->egl;
}
static void gles2_destroy(struct wlr_renderer *wlr_renderer) {
struct wlr_gles2_renderer *renderer = gles2_get_renderer(wlr_renderer);
wlr_egl_make_current(renderer->egl, EGL_NO_SURFACE, NULL);
PUSH_GLES2_DEBUG;
glDeleteProgram(renderer->shaders.quad.program);
glDeleteProgram(renderer->shaders.ellipse.program);
glDeleteProgram(renderer->shaders.tex_rgba.program);
glDeleteProgram(renderer->shaders.tex_rgbx.program);
glDeleteProgram(renderer->shaders.tex_ext.program);
POP_GLES2_DEBUG;
if (renderer->exts.debug_khr) {
glDisable(GL_DEBUG_OUTPUT_KHR);
glDebugMessageCallbackKHR(NULL, NULL);
}
free(renderer);
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}
static const struct wlr_renderer_impl renderer_impl = {
.destroy = gles2_destroy,
.begin = gles2_begin,
.end = gles2_end,
.clear = gles2_clear,
.scissor = gles2_scissor,
.render_texture_with_matrix = gles2_render_texture_with_matrix,
.render_quad_with_matrix = gles2_render_quad_with_matrix,
.render_ellipse_with_matrix = gles2_render_ellipse_with_matrix,
.formats = gles2_renderer_formats,
.format_supported = gles2_format_supported,
.resource_is_wl_drm_buffer = gles2_resource_is_wl_drm_buffer,
.wl_drm_buffer_get_size = gles2_wl_drm_buffer_get_size,
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.get_dmabuf_formats = gles2_get_dmabuf_formats,
.preferred_read_format = gles2_preferred_read_format,
.read_pixels = gles2_read_pixels,
.texture_from_pixels = gles2_texture_from_pixels,
.texture_from_wl_drm = gles2_texture_from_wl_drm,
.texture_from_dmabuf = gles2_texture_from_dmabuf,
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.init_wl_display = gles2_init_wl_display,
};
void push_gles2_marker(const char *file, const char *func) {
if (!glPushDebugGroupKHR) {
return;
}
int len = snprintf(NULL, 0, "%s:%s", file, func) + 1;
char str[len];
snprintf(str, len, "%s:%s", file, func);
glPushDebugGroupKHR(GL_DEBUG_SOURCE_APPLICATION_KHR, 1, -1, str);
}
void pop_gles2_marker(void) {
if (glPopDebugGroupKHR) {
glPopDebugGroupKHR();
}
}
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static enum wlr_log_importance gles2_log_importance_to_wlr(GLenum type) {
switch (type) {
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case GL_DEBUG_TYPE_ERROR_KHR: return WLR_ERROR;
case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_KHR: return WLR_ERROR;
case GL_DEBUG_TYPE_PORTABILITY_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_PERFORMANCE_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_OTHER_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_MARKER_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_PUSH_GROUP_KHR: return WLR_DEBUG;
case GL_DEBUG_TYPE_POP_GROUP_KHR: return WLR_DEBUG;
default: return WLR_DEBUG;
}
}
static void gles2_log(GLenum src, GLenum type, GLuint id, GLenum severity,
GLsizei len, const GLchar *msg, const void *user) {
_wlr_log(gles2_log_importance_to_wlr(type), "[GLES2] %s", msg);
}
static GLuint compile_shader(GLuint type, const GLchar *src) {
PUSH_GLES2_DEBUG;
GLuint shader = glCreateShader(type);
glShaderSource(shader, 1, &src, NULL);
glCompileShader(shader);
GLint ok;
glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
if (ok == GL_FALSE) {
glDeleteShader(shader);
shader = 0;
}
POP_GLES2_DEBUG;
return shader;
}
static GLuint link_program(const GLchar *vert_src, const GLchar *frag_src) {
PUSH_GLES2_DEBUG;
GLuint vert = compile_shader(GL_VERTEX_SHADER, vert_src);
if (!vert) {
goto error;
}
GLuint frag = compile_shader(GL_FRAGMENT_SHADER, frag_src);
if (!frag) {
glDeleteShader(vert);
goto error;
}
GLuint prog = glCreateProgram();
glAttachShader(prog, vert);
glAttachShader(prog, frag);
glLinkProgram(prog);
glDetachShader(prog, vert);
glDetachShader(prog, frag);
glDeleteShader(vert);
glDeleteShader(frag);
GLint ok;
glGetProgramiv(prog, GL_LINK_STATUS, &ok);
if (ok == GL_FALSE) {
glDeleteProgram(prog);
goto error;
}
POP_GLES2_DEBUG;
return prog;
error:
POP_GLES2_DEBUG;
return 0;
}
static bool check_gl_ext(const char *exts, const char *ext) {
size_t extlen = strlen(ext);
const char *end = exts + strlen(exts);
while (exts < end) {
if (exts[0] == ' ') {
exts++;
continue;
}
size_t n = strcspn(exts, " ");
if (n == extlen && strncmp(ext, exts, n) == 0) {
return true;
}
exts += n;
}
return false;
}
extern const GLchar quad_vertex_src[];
extern const GLchar quad_fragment_src[];
extern const GLchar ellipse_fragment_src[];
extern const GLchar tex_vertex_src[];
extern const GLchar tex_fragment_src_rgba[];
extern const GLchar tex_fragment_src_rgbx[];
extern const GLchar tex_fragment_src_external[];
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struct wlr_renderer *wlr_gles2_renderer_create(struct wlr_egl *egl) {
if (!load_glapi()) {
return NULL;
}
struct wlr_gles2_renderer *renderer =
calloc(1, sizeof(struct wlr_gles2_renderer));
if (renderer == NULL) {
return NULL;
}
wlr_renderer_init(&renderer->wlr_renderer, &renderer_impl);
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renderer->egl = egl;
if (!wlr_egl_make_current(renderer->egl, EGL_NO_SURFACE, NULL)) {
free(renderer);
return NULL;
}
renderer->exts_str = (const char *)glGetString(GL_EXTENSIONS);
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wlr_log(WLR_INFO, "Using %s", glGetString(GL_VERSION));
wlr_log(WLR_INFO, "GL vendor: %s", glGetString(GL_VENDOR));
wlr_log(WLR_INFO, "GL renderer: %s", glGetString(GL_RENDERER));
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wlr_log(WLR_INFO, "Supported GLES2 extensions: %s", renderer->exts_str);
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if (!check_gl_ext(renderer->exts_str, "GL_EXT_texture_format_BGRA8888")) {
wlr_log(WLR_ERROR, "BGRA8888 format not supported by GLES2");
free(renderer);
return NULL;
}
renderer->exts.read_format_bgra_ext =
check_gl_ext(renderer->exts_str, "GL_EXT_read_format_bgra");
renderer->exts.debug_khr =
check_gl_ext(renderer->exts_str, "GL_KHR_debug") &&
glDebugMessageCallbackKHR && glDebugMessageControlKHR;
renderer->exts.egl_image_external_oes =
check_gl_ext(renderer->exts_str, "GL_OES_EGL_image_external") &&
glEGLImageTargetTexture2DOES;
if (renderer->exts.debug_khr) {
glEnable(GL_DEBUG_OUTPUT_KHR);
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_KHR);
glDebugMessageCallbackKHR(gles2_log, NULL);
// Silence unwanted message types
glDebugMessageControlKHR(GL_DONT_CARE, GL_DEBUG_TYPE_POP_GROUP_KHR,
GL_DONT_CARE, 0, NULL, GL_FALSE);
glDebugMessageControlKHR(GL_DONT_CARE, GL_DEBUG_TYPE_PUSH_GROUP_KHR,
GL_DONT_CARE, 0, NULL, GL_FALSE);
}
PUSH_GLES2_DEBUG;
GLuint prog;
renderer->shaders.quad.program = prog =
link_program(quad_vertex_src, quad_fragment_src);
if (!renderer->shaders.quad.program) {
goto error;
}
renderer->shaders.quad.proj = glGetUniformLocation(prog, "proj");
renderer->shaders.quad.color = glGetUniformLocation(prog, "color");
renderer->shaders.ellipse.program = prog =
link_program(quad_vertex_src, ellipse_fragment_src);
if (!renderer->shaders.ellipse.program) {
goto error;
}
renderer->shaders.ellipse.proj = glGetUniformLocation(prog, "proj");
renderer->shaders.ellipse.color = glGetUniformLocation(prog, "color");
renderer->shaders.tex_rgba.program = prog =
link_program(tex_vertex_src, tex_fragment_src_rgba);
if (!renderer->shaders.tex_rgba.program) {
goto error;
}
renderer->shaders.tex_rgba.proj = glGetUniformLocation(prog, "proj");
renderer->shaders.tex_rgba.invert_y = glGetUniformLocation(prog, "invert_y");
renderer->shaders.tex_rgba.tex = glGetUniformLocation(prog, "tex");
renderer->shaders.tex_rgba.alpha = glGetUniformLocation(prog, "alpha");
renderer->shaders.tex_rgbx.program = prog =
link_program(tex_vertex_src, tex_fragment_src_rgbx);
if (!renderer->shaders.tex_rgbx.program) {
goto error;
}
renderer->shaders.tex_rgbx.proj = glGetUniformLocation(prog, "proj");
renderer->shaders.tex_rgbx.invert_y = glGetUniformLocation(prog, "invert_y");
renderer->shaders.tex_rgbx.tex = glGetUniformLocation(prog, "tex");
renderer->shaders.tex_rgbx.alpha = glGetUniformLocation(prog, "alpha");
if (renderer->exts.egl_image_external_oes) {
renderer->shaders.tex_ext.program = prog =
link_program(tex_vertex_src, tex_fragment_src_external);
if (!renderer->shaders.tex_ext.program) {
goto error;
}
renderer->shaders.tex_ext.proj = glGetUniformLocation(prog, "proj");
renderer->shaders.tex_ext.invert_y = glGetUniformLocation(prog, "invert_y");
renderer->shaders.tex_ext.tex = glGetUniformLocation(prog, "tex");
renderer->shaders.tex_ext.alpha = glGetUniformLocation(prog, "alpha");
}
POP_GLES2_DEBUG;
2017-10-21 21:20:26 +00:00
2017-08-14 12:37:50 +00:00
return &renderer->wlr_renderer;
error:
glDeleteProgram(renderer->shaders.quad.program);
glDeleteProgram(renderer->shaders.ellipse.program);
glDeleteProgram(renderer->shaders.tex_rgba.program);
glDeleteProgram(renderer->shaders.tex_rgbx.program);
glDeleteProgram(renderer->shaders.tex_ext.program);
POP_GLES2_DEBUG;
if (renderer->exts.debug_khr) {
glDisable(GL_DEBUG_OUTPUT_KHR);
glDebugMessageCallbackKHR(NULL, NULL);
}
free(renderer);
return NULL;
}