From ffc9c32b5e7a5fa9409339326c95e3eb80b257b4 Mon Sep 17 00:00:00 2001 From: Yuxuan Shui Date: Mon, 1 Apr 2019 19:55:11 +0100 Subject: [PATCH] gl_common: update gl_compose to core profile Signed-off-by: Yuxuan Shui --- src/backend/gl/gl_common.c | 108 +++++++++++++++++++++++-------------- src/backend/gl/gl_common.h | 1 + 2 files changed, 70 insertions(+), 39 deletions(-) diff --git a/src/backend/gl/gl_common.c b/src/backend/gl/gl_common.c index e5f7c0c..35b868b 100644 --- a/src/backend/gl/gl_common.c +++ b/src/backend/gl/gl_common.c @@ -174,6 +174,15 @@ void gl_compose(backend_t *base, void *image_data, int dst_x, int dst_y, return; } + // Painting + int nrects; + const rect_t *rects; + rects = pixman_region32_rectangles((region_t *)reg_tgt, &nrects); + if (!nrects) { + // Nothing to paint + return; + } + // dst_y is the top coordinate, in OpenGL, it is the upper bound of the y // coordinate. dst_y = gd->height - dst_y; @@ -181,20 +190,19 @@ void gl_compose(backend_t *base, void *image_data, int dst_x, int dst_y, bool dual_texture = false; - if (gd->win_shader.prog) { - glUseProgram(gd->win_shader.prog); - if (gd->win_shader.unifm_opacity >= 0) { - glUniform1f(gd->win_shader.unifm_opacity, (float)ptex->opacity); - } - if (gd->win_shader.unifm_invert_color >= 0) { - glUniform1i(gd->win_shader.unifm_invert_color, ptex->color_inverted); - } - if (gd->win_shader.unifm_tex >= 0) { - glUniform1i(gd->win_shader.unifm_tex, 0); - } - if (gd->win_shader.unifm_dim >= 0) { - glUniform1f(gd->win_shader.unifm_dim, (float)ptex->dim); - } + assert(gd->win_shader.prog); + glUseProgram(gd->win_shader.prog); + if (gd->win_shader.unifm_opacity >= 0) { + glUniform1f(gd->win_shader.unifm_opacity, (float)ptex->opacity); + } + if (gd->win_shader.unifm_invert_color >= 0) { + glUniform1i(gd->win_shader.unifm_invert_color, ptex->color_inverted); + } + if (gd->win_shader.unifm_tex >= 0) { + glUniform1i(gd->win_shader.unifm_tex, 0); + } + if (gd->win_shader.unifm_dim >= 0) { + glUniform1f(gd->win_shader.unifm_dim, (float)ptex->dim); } // log_trace("Draw: %d, %d, %d, %d -> %d, %d (%d, %d) z %d\n", @@ -207,17 +215,12 @@ void gl_compose(backend_t *base, void *image_data, int dst_x, int dst_y, glBindTexture(GL_TEXTURE_2D, ptex->texture); glActiveTexture(GL_TEXTURE0); } + auto coord = ccalloc(nrects * 16, GLfloat); + auto indices = ccalloc(nrects * 6, GLuint); - // Painting - int nrects; - - const rect_t *rects; - rects = pixman_region32_rectangles((region_t *)reg_tgt, &nrects); - - glBegin(GL_QUADS); - for (int ri = 0; ri < nrects; ++ri) { + for (int i = 0; i < nrects; ++i) { // Y-flip. Note after this, crect.y1 > crect.y2 - rect_t crect = rects[ri]; + rect_t crect = rects[i]; crect.y1 = gd->height - crect.y1; crect.y2 = gd->height - crect.y2; @@ -242,32 +245,52 @@ void gl_compose(backend_t *base, void *image_data, int dst_x, int dst_y, texture_y2 /= (GLfloat)ptex->height; // Vertex coordinates - GLint vx1 = crect.x1; - GLint vy1 = crect.y2; - GLint vx2 = crect.x2; - GLint vy2 = crect.y1; + auto vx1 = (GLfloat)crect.x1; + auto vy1 = (GLfloat)crect.y2; + auto vx2 = (GLfloat)crect.x2; + auto vy2 = (GLfloat)crect.y1; // log_trace("Rect %d: %f, %f, %f, %f -> %d, %d, %d, %d", // ri, rx, ry, rxe, rye, rdx, rdy, rdxe, rdye); - GLfloat texture_x[] = {texture_x1, texture_x2, texture_x2, texture_x1}; - GLfloat texture_y[] = {texture_y1, texture_y1, texture_y2, texture_y2}; - GLint vx[] = {vx1, vx2, vx2, vx1}; - GLint vy[] = {vy1, vy1, vy2, vy2}; + memcpy(&coord[i * 16], + (GLfloat[][2]){ + {vx1, vy1}, + {texture_x1, texture_y1}, + {vx2, vy1}, + {texture_x2, texture_y1}, + {vx2, vy2}, + {texture_x2, texture_y2}, + {vx1, vy2}, + {texture_x1, texture_y2}, + }, + sizeof(GLfloat[2]) * 8); - for (int i = 0; i < 4; i++) { - glVertexAttrib2f((GLuint)gd->win_shader.in_texcoord, texture_x[i], - texture_y[i]); - glVertex3i(vx[i], vy[i], 0); - } + GLuint u = (GLuint)(i * 4); + memcpy(&indices[i * 6], (GLuint[]){u + 0, u + 1, u + 2, u + 2, u + 3, u + 0}, + sizeof(GLuint) * 6); } - glEnd(); + GLuint bo[2]; + glGenBuffers(2, bo); + glBindBuffer(GL_ARRAY_BUFFER, bo[0]); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bo[1]); + glBufferData(GL_ARRAY_BUFFER, (long)sizeof(*coord) * nrects * 16, coord, GL_STATIC_DRAW); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, (long)sizeof(*indices) * nrects * 6, + indices, GL_STATIC_DRAW); + + glEnableVertexAttribArray((GLuint)gd->win_shader.coord_loc); + glEnableVertexAttribArray((GLuint)gd->win_shader.in_texcoord); + glVertexAttribPointer((GLuint)gd->win_shader.coord_loc, 2, GL_FLOAT, GL_FALSE, + sizeof(GLfloat) * 4, NULL); + glVertexAttribPointer((GLuint)gd->win_shader.in_texcoord, 2, GL_FLOAT, GL_FALSE, + sizeof(GLfloat) * 4, (void *)(sizeof(GLfloat) * 2)); + glDrawElements(GL_TRIANGLES, nrects * 6, GL_UNSIGNED_INT, NULL); + glDisableVertexAttribArray((GLuint)gd->win_shader.coord_loc); + glDisableVertexAttribArray((GLuint)gd->win_shader.in_texcoord); // Cleanup glBindTexture(GL_TEXTURE_2D, 0); - glColor4f(0.0f, 0.0f, 0.0f, 0.0f); - glDisable(GL_COLOR_LOGIC_OP); if (dual_texture) { glActiveTexture(GL_TEXTURE1); @@ -275,6 +298,13 @@ void gl_compose(backend_t *base, void *image_data, int dst_x, int dst_y, glActiveTexture(GL_TEXTURE0); } + glBindBuffer(GL_ARRAY_BUFFER, 0); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); + glDeleteBuffers(2, bo); + + free(indices); + free(coord); + glUseProgram(0); gl_check_err(); diff --git a/src/backend/gl/gl_common.h b/src/backend/gl/gl_common.h index f0598ff..993b669 100644 --- a/src/backend/gl/gl_common.h +++ b/src/backend/gl/gl_common.h @@ -22,6 +22,7 @@ typedef struct { GLint unifm_tex; GLint unifm_dim; GLint in_texcoord; + GLint coord_loc; } gl_win_shader_t; // Program and uniforms for blur shader