From e167f41fde7532ca453a9a70ad1e3f27d7177071 Mon Sep 17 00:00:00 2001
From: nyorain <nyorain@gmail.com>
Date: Tue, 8 Aug 2017 18:02:14 +0200
Subject: Rename wlr_surface -> wlr_texture; attach -> upload

---
 render/gles2/texture.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 render/gles2/texture.c

(limited to 'render/gles2/texture.c')

diff --git a/render/gles2/texture.c b/render/gles2/texture.c
new file mode 100644
index 00000000..bd588898
--- /dev/null
+++ b/render/gles2/texture.c
@@ -0,0 +1,104 @@
+#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));
+	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0));
+	texture->wlr_texture->valid = true;
+	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(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 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,
+	.upload_shm = gles2_texture_upload_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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