egl: Add a egl state_tracker that use Gallium

	This works on top Gallium and KMS. The only thing that
	does not work currently is swap buffers for shown mesa
	screens. So the only fun thing this will produce is a
	white screen.

	The driver wishing to us the state_tracker needs to
	implement the intrace as define in drm_api.h located
	in gallium/include/state_tracker. And also have a
	working KMS implementation.

1 files changed, 194 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/egl/egl_context.c b/src/gallium/state_trackers/egl/egl_context.c
new file mode 100644
index 0000000000..217fe00338
--- /dev/null
+++ b/src/gallium/state_trackers/egl/egl_context.c
@@ -0,0 +1,194 @@
+
+#include "utils.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "egl_tracker.h"
+
+#include "egllog.h"
+
+
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_winsys.h"
+
+#include "state_tracker/st_public.h"
+#include "state_tracker/drm_api.h"
+
+#include "GL/internal/glcore.h"
+
+#define need_GL_ARB_multisample
+#define need_GL_ARB_point_parameters
+#define need_GL_ARB_texture_compression
+#define need_GL_ARB_vertex_buffer_object
+#define need_GL_ARB_vertex_program
+#define need_GL_ARB_window_pos
+#define need_GL_EXT_blend_color
+#define need_GL_EXT_blend_equation_separate
+#define need_GL_EXT_blend_func_separate
+#define need_GL_EXT_blend_minmax
+#define need_GL_EXT_cull_vertex
+#define need_GL_EXT_fog_coord
+#define need_GL_EXT_framebuffer_object
+#define need_GL_EXT_multi_draw_arrays
+#define need_GL_EXT_secondary_color
+#define need_GL_NV_vertex_program
+#include "extension_helper.h"
+
+/**
+ * TODO HACK! FUGLY!
+ * Copied for intel extentions.
+ */
+const struct dri_extension card_extensions[] = {
+	{"GL_ARB_multisample", GL_ARB_multisample_functions},
+	{"GL_ARB_multitexture", NULL},
+	{"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
+	{"GL_ARB_texture_border_clamp", NULL},
+	{"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
+	{"GL_ARB_texture_cube_map", NULL},
+	{"GL_ARB_texture_env_add", NULL},
+	{"GL_ARB_texture_env_combine", NULL},
+	{"GL_ARB_texture_env_dot3", NULL},
+	{"GL_ARB_texture_mirrored_repeat", NULL},
+	{"GL_ARB_texture_rectangle", NULL},
+	{"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
+	{"GL_ARB_pixel_buffer_object", NULL},
+	{"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
+	{"GL_ARB_window_pos", GL_ARB_window_pos_functions},
+	{"GL_EXT_blend_color", GL_EXT_blend_color_functions},
+	{"GL_EXT_blend_equation_separate", GL_EXT_blend_equation_separate_functions},
+	{"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
+	{"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
+	{"GL_EXT_blend_subtract", NULL},
+	{"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
+	{"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
+	{"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
+	{"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
+	{"GL_EXT_packed_depth_stencil", NULL},
+	{"GL_EXT_pixel_buffer_object", NULL},
+	{"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
+	{"GL_EXT_stencil_wrap", NULL},
+	{"GL_EXT_texture_edge_clamp", NULL},
+	{"GL_EXT_texture_env_combine", NULL},
+	{"GL_EXT_texture_env_dot3", NULL},
+	{"GL_EXT_texture_filter_anisotropic", NULL},
+	{"GL_EXT_texture_lod_bias", NULL},
+	{"GL_3DFX_texture_compression_FXT1", NULL},
+	{"GL_APPLE_client_storage", NULL},
+	{"GL_MESA_pack_invert", NULL},
+	{"GL_MESA_ycbcr_texture", NULL},
+	{"GL_NV_blend_square", NULL},
+	{"GL_NV_vertex_program", GL_NV_vertex_program_functions},
+	{"GL_NV_vertex_program1_1", NULL},
+	{"GL_SGIS_generate_mipmap", NULL },
+	{NULL, NULL}
+};
+
+EGLContext
+drm_create_context(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list)
+{
+	struct drm_device *dev = (struct drm_device *)drv;
+	struct drm_context *ctx;
+	struct drm_context *share = NULL;
+	struct st_context *st_share = NULL;
+	_EGLConfig *conf;
+	int i;
+	__GLcontextModes *visual;
+
+	conf = _eglLookupConfig(drv, dpy, config);
+	if (!conf) {
+		_eglError(EGL_BAD_CONFIG, "eglCreateContext");
+		return EGL_NO_CONTEXT;
+	}
+
+	for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
+		switch (attrib_list[i]) {
+			/* no attribs defined for now */
+			default:
+				_eglError(EGL_BAD_ATTRIBUTE, "eglCreateContext");
+				return EGL_NO_CONTEXT;
+		}
+	}
+
+	ctx = (struct drm_context *) calloc(1, sizeof(struct drm_context));
+	if (!ctx)
+		goto err_c;
+
+	_eglInitContext(drv, dpy, &ctx->base, config, attrib_list);
+
+	ctx->pipe = drm_api_hocks.create_context(dev->screen);
+	if (!ctx->pipe)
+		goto err_pipe;
+
+	if (share)
+		st_share = share->st;
+
+	visual = drm_visual_from_config(conf);
+	ctx->st = st_create_context(ctx->pipe, visual, st_share);
+	drm_visual_modes_destroy(visual);
+
+	if (!ctx->st)
+		goto err_gl;
+
+	/* generate handle and insert into hash table */
+	_eglSaveContext(&ctx->base);
+	assert(_eglGetContextHandle(&ctx->base));
+
+	return _eglGetContextHandle(&ctx->base);
+
+err_gl:
+	ctx->pipe->destroy(ctx->pipe);
+err_pipe:
+	free(ctx);
+err_c:
+	return EGL_NO_CONTEXT;
+}
+
+EGLBoolean
+drm_destroy_context(_EGLDriver *drv, EGLDisplay dpy, EGLContext context)
+{
+	struct drm_context *c = lookup_drm_context(context);
+	_eglRemoveContext(&c->base);
+	if (c->base.IsBound) {
+		c->base.DeletePending = EGL_TRUE;
+	} else {
+		st_destroy_context(c->st);
+		c->pipe->destroy(c->pipe);
+		free(c);
+	}
+	return EGL_TRUE;
+}
+
+EGLBoolean
+drm_make_current(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext context)
+{
+	struct drm_surface *readSurf = lookup_drm_surface(read);
+	struct drm_surface *drawSurf = lookup_drm_surface(draw);
+	struct drm_context *ctx = lookup_drm_context(context);
+	EGLBoolean b;
+
+	b = _eglMakeCurrent(drv, dpy, draw, read, context);
+	if (!b)
+		return EGL_FALSE;
+
+	if (ctx) {
+		if (!drawSurf || !readSurf)
+			return EGL_FALSE;
+
+		drawSurf->user = ctx;
+		readSurf->user = ctx;
+
+		st_make_current(ctx->st, drawSurf->stfb, readSurf->stfb);
+
+		/* st_resize_framebuffer needs a bound context to work */
+		st_resize_framebuffer(drawSurf->stfb, drawSurf->w, drawSurf->h);
+		st_resize_framebuffer(readSurf->stfb, readSurf->w, readSurf->h);
+	} else {
+		drawSurf->user = NULL;
+		readSurf->user = NULL;
+
+		st_make_current(NULL, NULL, NULL);
+	}
+
+	return EGL_TRUE;
+}